Hook up WebRTC logging extension API to the underlying functionality.

content/public/browser/render_process_host.h

Index: content/public/browser/render_process_host.h
diff --git a/content/public/browser/render_process_host.h b/content/public/browser/render_process_host.h
index 35627c78b63c29a0ccb3935c23c8cd41f8ec154c..4d05b98d1e080df7b3c1754bc2ada31d24d3e4c5 100644
--- a/content/public/browser/render_process_host.h
+++ b/content/public/browser/render_process_host.h
@@ -9,6 +9,7 @@
 #include "base/id_map.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
+#include "base/supports_user_data.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_sender.h"
@@ -37,7 +38,8 @@ typedef base::Thread* (*RendererMainThreadFactoryFunction)(
 // communication channel. There will generally be one RenderProcessHost per
 // renderer process.
 class CONTENT_EXPORT RenderProcessHost : public IPC::Sender,
-                                         public IPC::Listener {
+                                         public IPC::Listener,
+                                         public base::SupportsUserData {
  public:
   typedef IDMap<RenderProcessHost>::iterator iterator;