android: Handle getViewSurface() failure gracefully.

content/common/gpu/image_transport_surface_android.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/common/gpu/image_transport_surface.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/gpu_channel_manager.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
 #include "content/common/gpu/gpu_surface_lookup.h"
 #include "content/public/common/content_switches.h"
 #include "ui/gl/gl_surface_egl.h"
 
 namespace content {
 
 // static
 scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateNativeSurface(
     GpuChannelManager* manager,
     GpuCommandBufferStub* stub,
     const gfx::GLSurfaceHandle& handle) {
   DCHECK(GpuSurfaceLookup::GetInstance());
   DCHECK_EQ(handle.transport_type, gfx::NATIVE_DIRECT);
   ANativeWindow* window =
       GpuSurfaceLookup::GetInstance()->AcquireNativeWidget(handle.handle);
-  CHECK(window) << "Failed to retrieve window handle.";
+  if (!window) {
+    LOG(WARNING) << "Failed to acquire native widget.";
+    return scoped_refptr<gfx::GLSurface>();
+  }
   scoped_refptr<gfx::GLSurface> surface =
       new gfx::NativeViewGLSurfaceEGL(window);
   bool initialize_success = surface->Initialize();
-  if (window)
-    ANativeWindow_release(window);
+  ANativeWindow_release(window);
   if (!initialize_success)
     return scoped_refptr<gfx::GLSurface>();
 
   return scoped_refptr<gfx::GLSurface>(
       new PassThroughImageTransportSurface(manager, stub, surface.get()));
 }
 
 }  // namespace content