Expose GpuMemoryBufferId through glGetImageivCHROMIUM.

components/mus/gles2/command_buffer_local.cc

Index: components/mus/gles2/command_buffer_local.cc
diff --git a/components/mus/gles2/command_buffer_local.cc b/components/mus/gles2/command_buffer_local.cc
index 971ccec6eb7fb49c2589662779465d63e457b147..31d90979910ed6cd165de6230eca71838cc8e7fb 100644
--- a/components/mus/gles2/command_buffer_local.cc
+++ b/components/mus/gles2/command_buffer_local.cc
@@ -309,6 +309,13 @@ int32_t CommandBufferLocal::CreateGpuMemoryBufferImage(size_t width,
   return CreateImage(buffer->AsClientBuffer(), width, height, internal_format);
 }
 
+int32_t CommandBufferLocal::GetImageGpuMemoryBufferId(unsigned image_id) {
+  // TODO: Once this class supports IOSurface GpuMemoryBuffer backed images, it

[piman, 2016/05/26 21:51:03]

nit: please add your username to the TODO and/or link a bug. It's not
necessarily that you're on the hook to do it, but you are the one with the
knowledge about what to do.

[erikchen, 2016/05/26 22:00:17]

Done.

+  // will also need to keep a local cache from image id to GpuMemoryBuffer id.
+  NOTIMPLEMENTED();
+  return -1;
+}
+
 void CommandBufferLocal::SignalQuery(uint32_t query_id,
                                      const base::Closure& callback) {
   DCHECK(CalledOnValidThread());