Fix destruction order between SurfaceManger and OffscreenCanvasSurfaceImpl

content/browser/compositor/surface_utils.cc

 // Copyright 2015 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/surface_utils.h"
 
 #include "base/callback_helpers.h"
 #include "base/memory/ref_counted.h"
 #include "build/build_config.h"
 #include "cc/output/copy_output_result.h"
@@ skipping 154 matching lines @@
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
   return factory->GetContextFactory()->CreateSurfaceIdAllocator();
 #endif
 }
 
 cc::SurfaceManager* GetSurfaceManager() {
 #if defined(OS_ANDROID)
   return CompositorImpl::GetSurfaceManager();
 #else
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
+  if (factory == NULL)
+    return nullptr;
   return factory->GetSurfaceManager();
 #endif
 }
 
 void CopyFromCompositingSurfaceHasResult(
     const gfx::Size& dst_size_in_pixel,
     const SkColorType color_type,
     const ReadbackRequestCallback& callback,
     std::unique_ptr<cc::CopyOutputResult> result) {
   if (result->IsEmpty() || result->size().IsEmpty()) {
@@ skipping 14 matching lines @@
     return;
   }
 
   DCHECK(result->HasBitmap());
   // Software path
   PrepareBitmapCopyOutputResult(output_size_in_pixel, color_type, callback,
                                 std::move(result));
 }
 
 }  // namespace content