gpu: Refactor memory buffer handling code out of content.

services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h

Index: services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h
diff --git a/services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h b/services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h
index a390ff61a15a04ac62179b7fba4e72424cb6bfb0..6b9899df3d1b0c6d4758df9fa6f33e130872f607 100644
--- a/services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h
+++ b/services/ui/public/cpp/mojo_gpu_memory_buffer_manager.h
@@ -8,13 +8,15 @@
 #include <memory>
 
 #include "base/macros.h"
+#include "base/single_thread_task_runner.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
+#include "services/ui/public/interfaces/gpu_service.mojom.h"
 
 namespace ui {
 
 class MojoGpuMemoryBufferManager : public gpu::GpuMemoryBufferManager {
  public:
-  MojoGpuMemoryBufferManager();
+  explicit MojoGpuMemoryBufferManager(mojom::GpuService* gpu_service);
   ~MojoGpuMemoryBufferManager() override;
 
   // Overridden from gpu::GpuMemoryBufferManager:
@@ -33,6 +35,18 @@ class MojoGpuMemoryBufferManager : public gpu::GpuMemoryBufferManager {
                                const gpu::SyncToken& sync_token) override;
 
  private:
+  void EnsureGpuServiceConnection();
+
+  void AllocateGpuMemoryBufferOnMain(gfx::GpuMemoryBufferId id,
+                                     const gfx::Size& size,
+                                     gfx::BufferFormat format,
+                                     gfx::BufferUsage usage,
+                                     gfx::GpuMemoryBufferHandle* handle,
+                                     base::WaitableEvent* event);
+
+  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
+  mojom::GpuService* gpu_service_;
+
   DISALLOW_COPY_AND_ASSIGN(MojoGpuMemoryBufferManager);
 };