Convert USE(NATIVE_FULLSCREEN_VIDEO) to a runtime enabled feature

content/shell/renderer/webkit_test_runner.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/shell/renderer/webkit_test_runner.h"
 
 #include <algorithm>
 #include <clocale>
 #include <cmath>
 
 #include "base/base64.h"
+#include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/files/file_path.h"
 #include "base/md5.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/history_item_serialization.h"
 #include "content/public/renderer/render_view.h"
 #include "content/public/renderer/render_view_visitor.h"
 #include "content/public/test/layouttest_support.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/common/webkit_test_helpers.h"
 #include "content/shell/renderer/shell_render_process_observer.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
@@ skipping 78 matching lines @@
 #endif
 
 void CopyCanvasToBitmap(SkCanvas* canvas,  SkBitmap* snapshot) {
   SkBaseDevice* device = skia::GetTopDevice(*canvas);
   const SkBitmap& bitmap = device->accessBitmap(false);
   const bool success = bitmap.copyTo(snapshot, SkBitmap::kARGB_8888_Config);
   DCHECK(success);
 
 #if !defined(OS_MACOSX)
   // Only the expected PNGs for Mac have a valid alpha channel.
-  MakeBitmapOpaque(snapshot);
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableOverlayFullscreenVideo))
+    MakeBitmapOpaque(snapshot);
 #endif
 }
 
 class SyncNavigationStateVisitor : public RenderViewVisitor {
  public:
   SyncNavigationStateVisitor() {}
   virtual ~SyncNavigationStateVisitor() {}
 
   virtual bool Visit(RenderView* render_view) OVERRIDE {
     SyncNavigationState(render_view);
@@ skipping 550 matching lines @@
       WebURLRequest(GURL(kAboutBlankURL)));
   Send(new ShellViewHostMsg_ResetDone(routing_id()));
 }
 
 void WebKitTestRunner::OnNotifyDone() {
   render_view()->GetWebView()->mainFrame()->executeScript(
       WebScriptSource(WebString::fromUTF8("testRunner.notifyDone();")));
 }
 
 }  // namespace content