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 e83287251df0a535f171f53070d58cd659a569b8..ed933773013103968521c8ef6f9da4fcd945392a 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -173,6 +173,27 @@ RendererWebKitPlatformSupportImpl::~RendererWebKitPlatformSupportImpl() {
 
 //------------------------------------------------------------------------------
 
+namespace {
+
+bool SendSyncMessageFromAnyThreadInternal(IPC::SyncMessage* msg) {
+  RenderThreadImpl* render_thread = RenderThreadImpl::current();
+  if (render_thread)
+    return render_thread->Send(msg);
+  scoped_refptr<IPC::SyncMessageFilter> sync_msg_filter(
+      ChildThread::current()->sync_message_filter());
+  return sync_msg_filter->Send(msg);
+}
+
+bool SendSyncMessageFromAnyThread(IPC::SyncMessage* msg) {
+  base::TimeTicks begin = base::TimeTicks::Now();
+  const bool success = SendSyncMessageFromAnyThread(msg);
+  base::TimeDelta delta = base::TimeTicks::Now() - begin;
+  ChildThread::current()->Send(new ViewHostMsg_SyncIPCElapsedTime(delta));

[jam, 2012/05/31 15:20:16]

you can histogram from the renderer, just call HISTOGRAM_TIMES here

[kinuko, 2012/05/31 17:10:36]

oooops... (ashamed) done.

+  return success;
+}
+
+}  // namespace
+
 WebKit::WebClipboard* RendererWebKitPlatformSupportImpl::clipboard() {
   return clipboard_.get();
 }
@@ -215,17 +236,6 @@ bool RendererWebKitPlatformSupportImpl::sandboxEnabled() {
   return !CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess);
 }
 
-bool RendererWebKitPlatformSupportImpl::SendSyncMessageFromAnyThread(
-    IPC::SyncMessage* msg) {
-  RenderThreadImpl* render_thread = RenderThreadImpl::current();
-  if (render_thread)
-    return render_thread->Send(msg);
-
-  scoped_refptr<IPC::SyncMessageFilter> sync_msg_filter(
-      ChildThread::current()->sync_message_filter());
-  return sync_msg_filter->Send(msg);
-}
-
 unsigned long long RendererWebKitPlatformSupportImpl::visitedLinkHash(
     const char* canonical_url,
     size_t length) {