Plumb GpuMemoryBuffer allocation to GPU process.

content/common/gpu/gpu_messages.h

Index: content/common/gpu/gpu_messages.h
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h
index 9e320e0a6d77452a0bd855ca1bfcc937d73b0b2e..5a0f4246f7a356148f8294fa31eed8b863cd3e9a 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -282,6 +282,19 @@ IPC_MESSAGE_CONTROL3(GpuMsg_DeleteImage,
                      int32, /* image_id */
                      int32 /* sync_point */)
 
+// Tells the GPU process to create a new gpu memory buffer for |handle|.
+IPC_MESSAGE_CONTROL5(GpuMsg_CreateGpuMemoryBuffer,
+                     gfx::GpuMemoryBufferHandle, /* handle */
+                     size_t, /* width */
+                     size_t, /* height */

[reveman, 2014/06/09 14:35:21]

I think this should either be gfx::Size or uint32 to be consistent with
ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer. If uint32, then we should
probably avoid to temporarily convert it to gfx::Size before passing it to
GpuMemoryBufferImpls.

+                     unsigned, /* internalformat */
+                     unsigned /* usage */)
+
+// Tells the GPU process to delete buffer.
+IPC_MESSAGE_CONTROL2(GpuMsg_DestroyGpuMemoryBuffer,
+                     gfx::GpuMemoryBufferHandle, /* handle */
+                     int32 /* sync_point */)
+
 // Tells the GPU process to create a context for collecting graphics card
 // information.
 IPC_MESSAGE_CONTROL0(GpuMsg_CollectGraphicsInfo)
@@ -368,6 +381,10 @@ IPC_MESSAGE_CONTROL1(GpuHostMsg_DestroyCommandBuffer,
 IPC_MESSAGE_CONTROL1(GpuHostMsg_ImageCreated,
                      gfx::Size /* size */)
 
+// Response from GPU to a GpuMsg_CreateGpuMemoryBuffer message.
+IPC_MESSAGE_CONTROL1(GpuHostMsg_GpuMemoryBufferCreated,
+                     gfx::GpuMemoryBufferHandle /* handle */)
+
 // Response from GPU to a GpuMsg_CollectGraphicsInfo.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_GraphicsInfoCollected,
                      gpu::GPUInfo /* GPU logging stats */)