Pass GpuMemoryBuffer backed VideoFrame from browser to renderer processes

content/renderer/media/video_capture_message_filter.cc

Index: content/renderer/media/video_capture_message_filter.cc
diff --git a/content/renderer/media/video_capture_message_filter.cc b/content/renderer/media/video_capture_message_filter.cc
index b6c92d2926ef31e52b29997d2498da9ae0578bae..076e96ec2abcc2e5f3d20bb9253534e649d2b578 100644
--- a/content/renderer/media/video_capture_message_filter.cc
+++ b/content/renderer/media/video_capture_message_filter.cc
@@ -61,6 +61,8 @@ bool VideoCaptureMessageFilter::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(VideoCaptureMsg_BufferReady, OnBufferReceived)
     IPC_MESSAGE_HANDLER(VideoCaptureMsg_StateChanged, OnDeviceStateChanged)
     IPC_MESSAGE_HANDLER(VideoCaptureMsg_NewBuffer, OnBufferCreated)
+    IPC_MESSAGE_HANDLER(VideoCaptureMsg_NewGpuMemoryBuffer,
+                        OnGpuMemoryBufferCreated)
     IPC_MESSAGE_HANDLER(VideoCaptureMsg_FreeBuffer, OnBufferDestroyed)
     IPC_MESSAGE_HANDLER(VideoCaptureMsg_DeviceSupportedFormatsEnumerated,
                         OnDeviceSupportedFormatsEnumerated)
@@ -103,7 +105,7 @@ void VideoCaptureMessageFilter::OnBufferCreated(
     base::SharedMemoryHandle handle,
     int length,
     int buffer_id) {
-  Delegate* delegate = find_delegate(device_id);
+  Delegate* const delegate = find_delegate(device_id);
   if (!delegate) {
     DLOG(WARNING) << "OnBufferCreated: Got video SHM buffer for a "
                      "non-existent or removed video capture.";
@@ -111,6 +113,7 @@ void VideoCaptureMessageFilter::OnBufferCreated(
     // Send the buffer back to Host in case it's waiting for all buffers
     // to be returned.
     base::SharedMemory::CloseHandle(handle);
+
     Send(new VideoCaptureHostMsg_BufferReady(device_id, buffer_id, 0, -1.0));
     return;
   }
@@ -118,6 +121,22 @@ void VideoCaptureMessageFilter::OnBufferCreated(
   delegate->OnBufferCreated(handle, length, buffer_id);
 }
 
+void VideoCaptureMessageFilter::OnGpuMemoryBufferCreated(
+    int device_id,
+    const std::vector<gfx::GpuMemoryBufferHandle>& gmb_handles,
+    const gfx::Size& size,
+    int buffer_id) {
+  Delegate* delegate = find_delegate(device_id);

[mcasas, 2015/08/21 03:57:25]

Delegate* const delegate

+  if (!delegate) {
+    DLOG(WARNING) << "OnBufferCreated: Got video GMB buffer for a "
+                     "non-existent or removed video capture.";
+    Send(new VideoCaptureHostMsg_BufferReady(device_id, buffer_id, 0, -1.0));

[mcasas, 2015/08/21 03:57:25]

0? -1.0??

Proposal:
0 /* release_sync_point */, -1.0  /* consumer_resource_utilization */

Here and in l.117.

+    return;
+  }
+
+  delegate->OnGpuMemoryBufferCreated(gmb_handles, size, buffer_id);
+}
+
 void VideoCaptureMessageFilter::OnBufferReceived(
     const VideoCaptureMsg_BufferReady_Params& params) {
   Delegate* const delegate = find_delegate(params.device_id);
@@ -139,7 +158,7 @@ void VideoCaptureMessageFilter::OnBufferReceived(
                              params.storage_type,
                              params.coded_size,
                              params.visible_rect,
-                             params.mailbox_holder);
+                             params.mailbox_holders);
 }
 
 void VideoCaptureMessageFilter::OnBufferDestroyed(