Adding UMA for sync IPCs

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index 580b11c185bde219805bf326b93efba279a47a99..2ee540b955fed8a3547ab60dbd4724bc29748062 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -19,6 +19,7 @@
 #include "content/common/npobject_util.h"
 #include "content/common/view_messages.h"
 #include "content/common/webmessageportchannel_impl.h"
+#include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/gpu_info.h"
 #include "content/public/renderer/content_renderer_client.h"
@@ -220,6 +221,8 @@ bool RendererWebKitPlatformSupportImpl::sandboxEnabled() {
 
 bool RendererWebKitPlatformSupportImpl::SendSyncMessageFromAnyThread(
     IPC::SyncMessage* msg) {
+  content::RecordAction(UserMetricsAction("SendSyncIPC_Renderer"));
+
   RenderThreadImpl* render_thread = RenderThreadImpl::current();
   if (render_thread)
     return render_thread->Send(msg);