Fix unit test failures from merge

src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_IDynamicIndexerAccessExpression.cs

-// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Test.Utilities;
@@ -356,8 +356,8 @@ void M(C c, dynamic d)
   Arguments(1):
       IArgument (ArgumentKind.Explicit, Matching Parameter: null) (OperationKind.Argument, IsInvalid) (Syntax: 'd')
         IParameterReferenceExpression: d (OperationKind.ParameterReferenceExpression, Type: dynamic, IsInvalid) (Syntax: 'd')
-        InConversion: null
-        OutConversion: null
+        InConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
+        OutConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS1501: No overload for method 'this' takes 1 arguments

src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_IDynamicInvocationExpression.cs

-// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Test.Utilities;
@@ -421,8 +421,8 @@ public void M2(int i, int j)
   Arguments(1):
       IArgument (ArgumentKind.Explicit, Matching Parameter: null) (OperationKind.Argument, IsInvalid) (Syntax: 'd')
         IParameterReferenceExpression: d (OperationKind.ParameterReferenceExpression, Type: dynamic, IsInvalid) (Syntax: 'd')
-        InConversion: null
-        OutConversion: null
+        InConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
+        OutConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS7036: There is no argument given that corresponds to the required formal parameter 'j' of 'C.M2(int, int)'

src/Compilers/CSharp/Test/Semantic/Semantics/DynamicTests.cs

@@ -1165,6 +1165,7 @@ static void M()
 
         #region Member Access, Invocation
 
+        [CompilerTrait(CompilerFeature.IOperation)]
         [Fact]
         public void TestDynamicMemberAccessErrors()
         {
@@ -1230,6 +1231,7 @@ static void M()
             TestDynamicMemberAccessCore(source);
         }
 
+        [CompilerTrait(CompilerFeature.IOperation)]
         [Fact]
         public void TestDynamicCallErrors()
         {
@@ -1276,6 +1278,7 @@ Type Arguments(0)
             VerifyOperationTreeAndDiagnosticsForTest<InvocationExpressionSyntax>(source, expectedOperationTree, expectedDiagnostics);
         }
 
+        [CompilerTrait(CompilerFeature.IOperation)]
         [Fact]
         public void TestDynamicArgumentsToCallsErrors()
         {
@@ -1296,8 +1299,8 @@ public void M(dynamic d, C c)
   Arguments(1):
       IArgument (ArgumentKind.Explicit, Matching Parameter: null) (OperationKind.Argument) (Syntax: 'd')
         IParameterReferenceExpression: d (OperationKind.ParameterReferenceExpression, Type: dynamic) (Syntax: 'd')
-        InConversion: null
-        OutConversion: null
+        InConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
+        OutConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS7036: There is no argument given that corresponds to the required formal parameter 'y' of 'C.Goo(int, int)'
@@ -1308,6 +1311,7 @@ public void M(dynamic d, C c)
             VerifyOperationTreeAndDiagnosticsForTest<InvocationExpressionSyntax>(source, expectedOperationTree, expectedDiagnostics);
         }
 
+        [CompilerTrait(CompilerFeature.IOperation)]
         [Fact]
         public void TestDynamicArgumentsToCalls()
         {
@@ -1335,12 +1339,12 @@ static void M(dynamic d, C c)
   Arguments(2):
       IArgument (ArgumentKind.Explicit, Matching Parameter: null) (OperationKind.Argument, IsInvalid) (Syntax: 'd')
         IParameterReferenceExpression: d (OperationKind.ParameterReferenceExpression, Type: dynamic, IsInvalid) (Syntax: 'd')
-        InConversion: null
-        OutConversion: null
+        InConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
+        OutConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
       IArgument (ArgumentKind.Explicit, Matching Parameter: null) (OperationKind.Argument, IsInvalid) (Syntax: 'd')
         IParameterReferenceExpression: d (OperationKind.ParameterReferenceExpression, Type: dynamic, IsInvalid) (Syntax: 'd')
-        InConversion: null
-        OutConversion: null
+        InConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
+        OutConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // CS0452: The type 'short' must be a reference type in order to use it as parameter 'T' in the generic type or method 'C.Goo<T>(int, int)'
@@ -1351,6 +1355,7 @@ static void M(dynamic d, C c)
             VerifyOperationTreeAndDiagnosticsForTest<InvocationExpressionSyntax>(source, expectedOperationTree, expectedDiagnostics);
         }
 
+        [CompilerTrait(CompilerFeature.IOperation)]
         [Fact]
         public void TestDynamicMemberAccess_EarlyBoundReceiver_OuterInstance()
         {
@@ -1381,8 +1386,8 @@ public void Goo()
   Arguments(1):
       IArgument (ArgumentKind.Explicit, Matching Parameter: null) (OperationKind.Argument, IsInvalid) (Syntax: 'd')
         ILocalReferenceExpression: d (OperationKind.LocalReferenceExpression, Type: dynamic, IsInvalid) (Syntax: 'd')
-        InConversion: null
-        OutConversion: null
+        InConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
+        OutConversion: CommonConversion (Exists: True, IsIdentity: True, IsNumeric: False, IsReference: False, IsUserDefined: False) (MethodSymbol: null)
 ";
             var expectedDiagnostics = new DiagnosticDescription[] {
                 // file.cs(15,13): error CS0120: An object reference is required for the non-static field, method, or property 'A.F'