Remove browser-side tracking of accelerated compositing

content/browser/web_contents/aura/overscroll_navigation_overlay_unittest.cc

 // Copyright 2014 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/browser/web_contents/aura/overscroll_navigation_overlay.h"
 
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/web_contents/aura/image_window_delegate.h"
 #include "content/browser/web_contents/web_contents_view.h"
 #include "content/common/view_messages.h"
@@ skipping 55 matching lines @@
 
     const GURL first("https://www.google.com");
     contents()->NavigateAndCommit(first);
     EXPECT_TRUE(controller().GetVisibleEntry());
     EXPECT_FALSE(controller().CanGoBack());
 
     const GURL second("http://www.chromium.org");
     contents()->NavigateAndCommit(second);
     EXPECT_TRUE(controller().CanGoBack());
 
-    // Turn on compositing.
-    ViewHostMsg_DidActivateAcceleratedCompositing msg(
-        test_rvh()->GetRoutingID(), true);
-    RenderViewHostTester::TestOnMessageReceived(test_rvh(), msg);
-
     // Receive a paint update. This is necessary to make sure the size is set
     // correctly in RenderWidgetHostImpl.
     ViewHostMsg_UpdateRect_Params params;
     memset(&params, 0, sizeof(params));
     params.view_size = gfx::Size(10, 10);
     ViewHostMsg_UpdateRect rect(test_rvh()->GetRoutingID(), params);
     RenderViewHostTester::TestOnMessageReceived(test_rvh(), rect);
 
     // Reset pending flags for size/paint.
     test_rvh()->ResetSizeAndRepaintPendingFlags();
@@ skipping 124 matching lines @@
   // Navigation was committed and the load update was received - the flag
   // should now be updated.
   EXPECT_TRUE(GetOverlay()->loading_complete_);
 
   EXPECT_TRUE(GetOverlay()->web_contents());
   ReceivePaintUpdate();
   EXPECT_FALSE(GetOverlay()->web_contents());
 }
 
 }  // namespace content