Don't expect ack for ViewMsg_OnResize if backing size is empty

content/public/test/render_widget_test.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_TEST_RENDER_WIDGET_TEST_H_
 #define CONTENT_PUBLIC_TEST_RENDER_WIDGET_TEST_H_
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "content/public/test/render_view_test.h"
@@ skipping 24 matching lines @@
   // in the given bitmap.  The widget is resized to |page_size| before we paint
   // and the final image is resized to |desired_size|. This method is virtual so
   // that TestResizeAndPaint() can be reused by subclasses of this test class.
   virtual void ResizeAndPaint(const gfx::Size& page_size,
                               const gfx::Size& desired_size,
                               SkBitmap* snapshot);
 
   // Test for ResizeAndPaint.
   void TestResizeAndPaint();
 
+  // Test for OnResize and Resize.
+  void TestOnResize();
+
   // Helper function which returns true if the given bitmap contains the given
   // ARGB color and false otherwise.
   bool ImageContainsColor(const SkBitmap& bitmap, uint32 argb_color);
 
   // This can be used for debugging if you want to output a bitmap
   // image to a file.
   // FilePath tmp_path;
   // file_util::CreateTemporaryFile(&tmp_path);
   // OutputBitmapToFile(bitmap, tmp_path);
   // LOG(INFO) << "Bitmap image stored at: " << tmp_path.value();
   void OutputBitmapToFile(const SkBitmap& bitmap,
                           const base::FilePath& file_path);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_RENDER_WIDGET_TEST_H_