content: Fix Context creation logic in ContextProviderFactoryImpl.

content/browser/renderer_host/context_provider_factory_impl_android.h

 // Copyright 2016 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_CONTEXT_PROVIDER_FACTORY_IMPL_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_CONTEXT_PROVIDER_FACTORY_IMPL_ANDROID_H_
 
 #include <list>
 
 #include "base/macros.h"
@@ skipping 23 matching lines @@
 class ContextProviderCommandBuffer;
 
 class CONTENT_EXPORT ContextProviderFactoryImpl
     : public ui::ContextProviderFactory {
  public:
   static ContextProviderFactoryImpl* GetInstance();
 
   ~ContextProviderFactoryImpl() override;
 
   // The callback may be triggered synchronously, if the Gpu Channel is already
-  // initialized. In case the surface_handle is invalidated before the context
-  // can be created, the request is dropped and the callback will *not* run.
+  // initialized. In case the context creation fails, a null context is passed
+  // with the failure reason.
   void CreateDisplayContextProvider(
       gpu::SurfaceHandle surface_handle,
       gpu::SharedMemoryLimits shared_memory_limits,
       gpu::gles2::ContextCreationAttribHelper attributes,
       bool support_locking,
       bool automatic_flushes,
       ContextProviderCallback result_callback);
 
   // ContextProviderFactory implementation.
   scoped_refptr<cc::VulkanContextProvider> GetSharedVulkanContextProvider()
@@ skipping 35 matching lines @@
     gpu::gles2::ContextCreationAttribHelper attributes;
     bool support_locking;
     bool automatic_flushes;
     cc::ContextProvider* shared_context_provider;
     ContextProviderCallback result_callback;
   };
 
   ContextProviderFactoryImpl();
 
   // Will return nullptr if the Gpu channel has not been established.
-  gpu::GpuChannelHost* EnsureGpuChannelEstablished();
+  void EstablishGpuChannel();
   void OnGpuChannelEstablished(scoped_refptr<gpu::GpuChannelHost> gpu_channel);
   void OnGpuChannelTimeout();
 
-  void HandlePendingRequests();
+  void CheckCanHandlePendingRequests();
+  void HandlePendingRequests(
+      scoped_refptr<gpu::GpuChannelHost> gpu_channel_host,
+      ContextCreationFailureReason reason);
 
   std::list<ContextProvidersRequest> context_provider_requests_;
 
   scoped_refptr<ContextProviderCommandBuffer> shared_worker_context_provider_;
 
   scoped_refptr<cc::VulkanContextProvider> shared_vulkan_context_provider_;
 
   bool in_handle_pending_requests_;
 
   base::OneShotTimer establish_gpu_channel_timeout_;
 
   std::unique_ptr<cc::SurfaceManager> surface_manager_;
   int surface_client_id_;
 
   base::WeakPtrFactory<ContextProviderFactoryImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ContextProviderFactoryImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_CONTEXT_PROVIDER_FACTORY_IMPL_ANDROID_H_