Route IPC through browser when creating a viewable command buffer.

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index 6d331d0d761647c0a12672e04984ef7a786e36a3..8615ae5af6c2ac0685f8e486a6895fc32e4b245a 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -47,6 +47,7 @@
 typedef std::map<std::string, std::string> SubstitutionMap;
 
 class Value;
+struct GPUCreateCommandBufferConfig;
 class GPUInfo;
 class SkBitmap;
 struct ThumbnailScore;
@@ -1532,6 +1533,13 @@ IPC_MESSAGE_CONTROL0(ViewHostMsg_EstablishGpuChannel)
 // been established.
 IPC_SYNC_MESSAGE_CONTROL0_0(ViewHostMsg_SynchronizeGpu)
 
+// A renderer sends this to the browser process when it wants to
+// create a GL context associated with the given view_id.
+IPC_SYNC_MESSAGE_CONTROL2_1(ViewHostMsg_CreateViewCommandBuffer,
+                            int32, /* render_view_id */
+                            GPUCreateCommandBufferConfig, /* init_params */
+                            int32 /* route_id */)
+
 // A renderer sends this to the browser process when it wants to start
 // a new instance of the Native Client process. The browser will launch
 // the process and return a handle to an IMC channel.