Show GpuMemoryBuffer feature in chrome://gpu

content/browser/gpu/browser_gpu_memory_buffer_manager.h

 // 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.
 
 #ifndef CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
 #define CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
 
 #include <utility>
 
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 
 namespace content {
 
 using GpuMemoryBufferConfigurationKey =
     std::pair<gfx::BufferFormat, gfx::BufferUsage>;
 using GpuMemoryBufferConfigurationSet =
     base::hash_set<GpuMemoryBufferConfigurationKey>;
+using GpuMemoryBufferConfigurationList =
+    std::list<GpuMemoryBufferConfigurationKey>;
 
 }  // content
 
 namespace BASE_HASH_NAMESPACE {
 
 template <>
 struct hash<content::GpuMemoryBufferConfigurationKey> {
   size_t operator()(const content::GpuMemoryBufferConfigurationKey& key) const {
     return base::HashPair(static_cast<int>(key.first),
                           static_cast<int>(key.second));
@@ skipping 54 matching lines @@
       base::ProcessHandle child_process_handle,
       int child_client_id,
       const AllocationCallback& callback);
   void ChildProcessDeletedGpuMemoryBuffer(
       gfx::GpuMemoryBufferId id,
       base::ProcessHandle child_process_handle,
       int child_client_id,
       uint32 sync_point);
   void ProcessRemoved(base::ProcessHandle process_handle, int client_id);
 
+  GpuMemoryBufferConfigurationList
+      GetNativeGpuMemoryBufferEnabledAndSupported() { return native_enabled_and_supported_;}
  private:
   struct BufferInfo {
     BufferInfo()
         : type(gfx::EMPTY_BUFFER),
           format(gfx::BufferFormat::RGBA_8888),
           usage(gfx::BufferUsage::MAP),
           gpu_host_id(0) {}
     BufferInfo(const gfx::Size& size,
                gfx::GpuMemoryBufferType type,
                gfx::BufferFormat format,
@@ skipping 56 matching lines @@
                                   bool reused_gpu_process,
                                   const CreateCallback& callback,
                                   const gfx::GpuMemoryBufferHandle& handle);
   void DestroyGpuMemoryBufferOnIO(gfx::GpuMemoryBufferId id,
                                   int client_id,
                                   uint32 sync_point);
 
   uint64_t ClientIdToTracingProcessId(int client_id) const;
 
   const GpuMemoryBufferConfigurationSet native_configurations_;
+  const GpuMemoryBufferConfigurationList native_enabled_and_supported_;
   const int gpu_client_id_;
   const uint64_t gpu_client_tracing_id_;
 
   // The GPU process host ID. This should only be accessed on the IO thread.
   int gpu_host_id_;
 
   // Stores info about buffers for all clients. This should only be accessed
   // on the IO thread.
   using BufferMap = base::hash_map<gfx::GpuMemoryBufferId, BufferInfo>;
   using ClientMap = base::hash_map<int, BufferMap>;
   ClientMap clients_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserGpuMemoryBufferManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_