Plumb GpuMemoryBuffer allocation to GPU process.

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index 97a9ef868354a1a9cc55038114d1a7542db908ce..9715a2508acb75fb53c3963b29615b93db78dafb 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -562,6 +562,8 @@ bool GpuProcessHost::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(GpuHostMsg_CommandBufferCreated, OnCommandBufferCreated)
     IPC_MESSAGE_HANDLER(GpuHostMsg_DestroyCommandBuffer, OnDestroyCommandBuffer)
     IPC_MESSAGE_HANDLER(GpuHostMsg_ImageCreated, OnImageCreated)
+    IPC_MESSAGE_HANDLER(GpuHostMsg_GpuMemoryBufferAllocated,
+                        OnGpuMemoryBufferAllocated)
     IPC_MESSAGE_HANDLER(GpuHostMsg_DidCreateOffscreenContext,
                         OnDidCreateOffscreenContext)
     IPC_MESSAGE_HANDLER(GpuHostMsg_DidLoseContext, OnDidLoseContext)
@@ -667,6 +669,20 @@ void GpuProcessHost::DeleteImage(int client_id,
   Send(new GpuMsg_DeleteImage(client_id, image_id, sync_point));
 }
 
+void GpuProcessHost::AllocateGpuMemoryBuffer(
+    const gfx::GpuMemoryBufferParams& params,
+    const AllocateGpuMemoryBufferCallback& callback) {
+  TRACE_EVENT0("gpu", "GpuProcessHost::CreateImage");
+
+  DCHECK(CalledOnValidThread());
+
+  if (Send(new GpuMsg_AllocateGpuMemoryBuffer(params))) {
+    allocate_gpu_memory_buffer_requests_.push(callback);
+  } else {
+    callback.Run(gfx::GpuMemoryBufferHandle());
+  }
+}
+
 void GpuProcessHost::OnInitialized(bool result, const gpu::GPUInfo& gpu_info) {
   UMA_HISTOGRAM_BOOLEAN("GPU.GPUProcessInitialized", result);
   initialized_ = result;
@@ -740,6 +756,19 @@ void GpuProcessHost::OnImageCreated(const gfx::Size size) {
   callback.Run(size);
 }
 
+void GpuProcessHost::OnGpuMemoryBufferAllocated(
+    const gfx::GpuMemoryBufferHandle& handle) {
+  TRACE_EVENT0("gpu", "GpuProcessHost::OnImageCreated");
+
+  if (allocate_gpu_memory_buffer_requests_.empty())
+    return;
+
+  AllocateGpuMemoryBufferCallback callback =
+      allocate_gpu_memory_buffer_requests_.front();
+  allocate_gpu_memory_buffer_requests_.pop();
+  callback.Run(handle);
+}
+
 void GpuProcessHost::OnDidCreateOffscreenContext(const GURL& url) {
   urls_with_live_offscreen_contexts_.insert(url);
 }