Support multiple HW video decoders per context.

content/common/gpu/gpu_channel.cc

Index: content/common/gpu/gpu_channel.cc
diff --git a/content/common/gpu/gpu_channel.cc b/content/common/gpu/gpu_channel.cc
index 459c5ec87f1cdf6330963902da6559d2638931f7..2bc36ba86a0dbeba2097f733a80b6c0342f35b31 100644
--- a/content/common/gpu/gpu_channel.cc
+++ b/content/common/gpu/gpu_channel.cc
@@ -286,6 +286,14 @@ int GpuChannel::GenerateRouteID() {
   return ++last_id;
 }
 
+void GpuChannel::AddRoute(int32 route_id, IPC::Channel::Listener* listener) {
+  router_.AddRoute(route_id, listener);
+}
+
+void GpuChannel::RemoveRoute(int32 route_id) {
+  router_.RemoveRoute(route_id);
+}
+
 void GpuChannel::OnInitialize(base::ProcessHandle renderer_process) {
   // Initialize should only happen once.
   DCHECK(!renderer_process_);