gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h

Index: content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h b/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
index c48415bedd3dbe078ddee6b7afa5c6c308808524..61c568c24c2eb3cd494eb063209aa6b81a04bcd4 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
@@ -15,12 +15,14 @@ namespace content {
 // Implementation of GPU memory buffer based on IO surfaces.
 class GpuMemoryBufferImplIOSurface : public GpuMemoryBufferImpl {
  public:
-  static void Create(const gfx::Size& size,
+  static void Create(gfx::GpuMemoryBufferId id,
+                     const gfx::Size& size,
                      Format format,
                      int client_id,
                      const CreationCallback& callback);
 
-  static void AllocateForChildProcess(const gfx::Size& size,
+  static void AllocateForChildProcess(gfx::GpuMemoryBufferId id,
+                                      const gfx::Size& size,
                                       Format format,
                                       int child_client_id,
                                       const AllocationCallback& callback);
@@ -43,7 +45,8 @@ class GpuMemoryBufferImplIOSurface : public GpuMemoryBufferImpl {
   gfx::GpuMemoryBufferHandle GetHandle() const override;
 
  private:
-  GpuMemoryBufferImplIOSurface(const gfx::Size& size,
+  GpuMemoryBufferImplIOSurface(gfx::GpuMemoryBufferId id,
+                               const gfx::Size& size,
                                Format format,
                                const DestructionCallback& callback,
                                IOSurfaceRef io_surface);