deprecate old ctor but keep it working

src/vs/vscode.d.ts

@@ -1748,6 +1748,8 @@ declare namespace vscode {
 		constructor(name: string, kind: SymbolKind, containerName: string, location: Location);
 
 		/**
+		 * @deprecated Please use the constructor taking a [location](#Location) object.
+		 *
 		 * Creates a new symbol information object.
 		 *
 		 * @param name The name of the symbol.

src/vs/workbench/api/node/extHostTypes.ts

@@ -641,8 +641,8 @@ export class SymbolInformation {
 
 		if (locationOrUri instanceof Location) {
 			this.location = locationOrUri;
-		} else if(locationOrUri instanceof URI && rangeOrContainer instanceof Range) {
-			this.location = new Location(locationOrUri, rangeOrContainer);
+		} else if (rangeOrContainer instanceof Range) {
+			this.location = new Location(<URI> locationOrUri, rangeOrContainer);
 		}
 	}
 

src/vs/workbench/test/node/api/extHostTypes.test.ts

@@ -409,4 +409,11 @@ suite('ExtHostTypes', function () {
 		assertToJSON(item, { label: 'complete', kind: 'Interface' });
 
 	});
+
+	test('SymbolInformation, old ctor', function () {
+
+		let info = new types.SymbolInformation('foo', types.SymbolKind.Array, new types.Range(1, 1, 2, 3));
+		assert.ok(info.location instanceof types.Location);
+		assert.equal(info.location.uri, undefined);
+	});
 });
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