Removes per-method body state from PEWriter. (changeset 1257070)

Src/Compilers/Core/Source/CodeGen/ILBuilder.cs

@@ -869,8 +869,8 @@ private void RealizeBlocks()
             }
 
             // Now linearize everything with computed offsets.
-            var realizedIlBitStream = Microsoft.Cci.MemoryStream.GetInstance();
-            var writer = new Microsoft.Cci.BinaryWriter(realizedIlBitStream);
+            var realizedIlBitStream = Cci.MemoryStream.GetInstance();
+            var writer = new Cci.BinaryWriter(realizedIlBitStream);
 
             for (var block = leaderBlock; block != null; block = block.NextBlock)
             {

Src/Compilers/Core/Source/PEWriter/PdbWriter.cs

@@ -77,11 +77,10 @@ private void Close()
             }
         }
 
-        public void CloseMethod(uint offset)
+        public void CloseMethod()
         {
             try
             {
-                this.symWriter.CloseScope(offset);
                 this.symWriter.CloseMethod();
             }
             catch (Exception ex)

Src/Test/PdbUtilities/Pdb/PdbToXml.cs

@@ -819,6 +819,7 @@ private void WriteLocalsHelper(ISymbolScope scope, Dictionary<int, ImmutableArra
                 }
                 writer.WriteEndElement(); // </local>
             }
+
             foreach (ISymbolConstant c in ((ISymbolScope2)scope).GetConstants())
             {
                 // Note: We can retrieve constant tokens by saving it into signature blob