Don't layout twice in ui::Compositor

ui/compositor/compositor.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 "ui/compositor/compositor.h"
 
 #include <algorithm>
 #include <deque>
 
 #include "base/bind.h"
@@ skipping 213 matching lines @@
   waiting_on_compositing_end_ = true;
   last_started_frame_++;
   if (!IsLocked()) {
     // TODO(nduca): Temporary while compositor calls
     // compositeImmediately() directly.
     cc::BeginFrameArgs args =
         cc::BeginFrameArgs::Create(gfx::FrameTime::Now(),
                                    base::TimeTicks(),
                                    cc::BeginFrameArgs::DefaultInterval());
     BeginMainFrame(args);
-    Layout();
     host_->Composite(args.frame_time);
   }
   if (swap_state_ == SWAP_NONE)
     NotifyEnd();
 }
 
 void Compositor::ScheduleFullRedraw() {
   host_->SetNeedsRedraw();
 }
 
@@ skipping 199 matching lines @@
     // Call ScheduleDraw() instead of Draw() in order to allow other
     // CompositorObservers to be notified before starting another
     // draw cycle.
     ScheduleDraw();
   }
   FOR_EACH_OBSERVER(
       CompositorObserver, observer_list_, OnCompositingEnded(this));
 }
 
 }  // namespace ui