Add scale factor and 2x resources from webkit and plumb through to ContentClient.

webkit/support/platform_support_win.cc

Index: webkit/support/platform_support_win.cc
diff --git a/webkit/support/platform_support_win.cc b/webkit/support/platform_support_win.cc
index 0d5eee286472165727c2391531e90f13ae4f496f..9d1cb02d89e24e43fa621d428cb9815c156421a1 100644
--- a/webkit/support/platform_support_win.cc
+++ b/webkit/support/platform_support_win.cc
@@ -73,6 +73,12 @@ string16 TestWebKitPlatformSupport::GetLocalizedString(int message_id) {
 }
 
 base::StringPiece TestWebKitPlatformSupport::GetDataResource(int resource_id) {
+  return ResourceProvider(resource_id);
+}
+
+base::StringPiece TestWebKitPlatformSupport::GetImageResource(
+    int resource_id,
+    float scale_factor) {
   switch (resource_id) {
   case IDR_BROKENIMAGE: {
     // Use webkit's broken image icon (16x16)
@@ -100,5 +106,6 @@ base::StringPiece TestWebKitPlatformSupport::GetDataResource(int resource_id) {
   }
   }
 
+  // TODO(flackr): Pass scale_factor to ResourceProvider.
   return ResourceProvider(resource_id);
 }