aura: Defer OutputSurface creation until widget is available

content/browser/compositor/browser_compositor_view_mac.mm

 // 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/compositor/browser_compositor_view_mac.h"
 
 #include "base/lazy_instance.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/compositor/image_transport_factory.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
@@ skipping 26 matching lines @@
       gpu::FORCE_GL_FINISH_AFTER_COMPOSITING);
 }
 
 }  // namespace
 
 BrowserCompositorMac::BrowserCompositorMac()
     : accelerated_widget_mac_(
           new ui::AcceleratedWidgetMac(WidgetNeedsGLFinishWorkaround())),
       compositor_(content::GetContextFactory(),
                   ui::WindowResizeHelperMac::Get()->task_runner()) {
-  compositor_.SetAcceleratedWidgetAndStartCompositor(
+  compositor_.SetAcceleratedWidget(
       accelerated_widget_mac_->accelerated_widget());
   compositor_.SetLocksWillTimeOut(false);
   Suspend();
   compositor_.AddObserver(this);
 }
 
 BrowserCompositorMac::~BrowserCompositorMac() {
   compositor_.RemoveObserver(this);
 }
 
@@ skipping 57 matching lines @@
   DCHECK_GT(g_placeholder_count, 0u);
   g_placeholder_count -= 1;
 
   // If there are no placeholders allocated, destroy the recyclable
   // BrowserCompositorMac.
   if (!g_placeholder_count)
     g_recyclable_browser_compositor.Get().reset();
 }
 
 }  // namespace content