Simplify platform_canvas.h by recognizing that PlatformCanvas does not actually extend

content/renderer/browser_plugin/browser_plugin.cc

 // 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.
 
 #include "content/renderer/browser_plugin/browser_plugin.h"
 
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #if defined (OS_WIN)
 #include "base/sys_info.h"
@@ skipping 739 matching lines @@
     const WebVector<WebRect>& cut_outs_rects,
     bool is_visible) {
   int old_width = width();
   int old_height = height();
   plugin_rect_ = window_rect;
   if (auto_size_ || (old_width == window_rect.width &&
                     old_height == window_rect.height)) {
     return;
   }
 
-  const size_t stride = skia::PlatformCanvas::StrideForWidth(window_rect.width);
+  const size_t stride = skia::PlatformCanvasStrideForWidth(window_rect.width);
   // Make sure the size of the damage buffer is at least four bytes so that we
   // can fit in a magic word to verify that the memory is shared correctly.
   size_t size =
       std::max(sizeof(unsigned int),
                static_cast<size_t>(window_rect.height *
                                    stride *
                                    GetDeviceScaleFactor() *
                                    GetDeviceScaleFactor()));
 
   // Don't drop the old damage buffer until after we've made sure that the
@@ skipping 183 matching lines @@
                                                  void* notify_data) {
 }
 
 void BrowserPlugin::didFailLoadingFrameRequest(
     const WebKit::WebURL& url,
     void* notify_data,
     const WebKit::WebURLError& error) {
 }
 
 }  // namespace content