Optionally clear PlatformCanvas instances.

chrome/renderer/automation/automation_renderer_helper.cc

 // Copyright (c) 2011 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 "chrome/renderer/automation/automation_renderer_helper.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "chrome/common/automation_messages.h"
@@ skipping 33 matching lines @@
   WebSize fixed_size = view->fixedLayoutSize();
 
   frame->setCanHaveScrollbars(false);
   view->setFixedLayoutSize(old_size);
   view->enableFixedLayoutMode(true);
   view->resize(new_size);
   view->layout();
   frame->setScrollOffset(WebSize(0, 0));
 
   skia::PlatformCanvas canvas(
-      new_size.width, new_size.height, true /* is_opaque */);
+      new_size.width, new_size.height, skia::PlatformDevice::FLAGS_OPAQUE);
   view->paint(webkit_glue::ToWebCanvas(&canvas),
               gfx::Rect(0, 0, new_size.width, new_size.height));
 
   frame->setCanHaveScrollbars(true);
   view->setFixedLayoutSize(fixed_size);
   view->enableFixedLayoutMode(fixed_layout_enabled);
   view->resize(old_size);
   view->layout();
   frame->setScrollOffset(WebSize(old_scroll.width - min_scroll.width,
                                  old_scroll.height - min_scroll.height));
@@ skipping 61 matching lines @@
 void AutomationRendererHelper::DidCancelClientRedirect(WebFrame* frame) {
   Send(new AutomationMsg_DidCompleteOrCancelClientRedirect(
       routing_id(), frame->identifier()));
 }
 
 void AutomationRendererHelper::DidCompleteClientRedirect(
     WebFrame* frame, const WebURL& from) {
   Send(new AutomationMsg_DidCompleteOrCancelClientRedirect(
       routing_id(), frame->identifier()));
 }