Remove old createLayerTreeViewForTesting() from platform support.

content/test/test_webkit_platform_support.cc

Index: content/test/test_webkit_platform_support.cc
diff --git a/content/test/test_webkit_platform_support.cc b/content/test/test_webkit_platform_support.cc
index 47c11c21da1513e28fe78ba3d07a95e7234247c8..303e9e6f1210e369de35475ec029a0182d3d4f6b 100644
--- a/content/test/test_webkit_platform_support.cc
+++ b/content/test/test_webkit_platform_support.cc
@@ -273,12 +273,6 @@ TestWebKitPlatformSupport::createLayerTreeViewForTesting() {
   return view.release();
 }
 
-blink::WebLayerTreeView*
-TestWebKitPlatformSupport::createLayerTreeViewForTesting(TestViewType type) {
-  DCHECK_EQ(TestViewTypeUnitTest, type);
-  return createLayerTreeViewForTesting();
-}
-
 blink::WebData TestWebKitPlatformSupport::readFromFile(
     const blink::WebString& path) {
   base::FilePath file_path = base::FilePath::FromUTF16Unsafe(path);