Upstream support for WebKit shared timer toggling.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 19e02596992b6b79122616234bda21a0afe0ba02..dde125387a3c661693869bc004761f70b012f012 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -849,6 +849,17 @@ int32 RenderThreadImpl::RoutingIDForCurrentContext() {
   return routing_id;
 }
 
+void RenderThreadImpl::ToggleWebKitSharedTimer(bool suspend) {
+  if (suspend_webkit_shared_timer_) {
+    EnsureWebKitInitialized();
+    if (suspend) {
+      webkit_platform_support_->SuspendSharedTimer();
+    } else {
+      webkit_platform_support_->ResumeSharedTimer();
+    }
+  }
+}
+
 void RenderThreadImpl::DoNotSuspendWebKitSharedTimer() {
   suspend_webkit_shared_timer_ = false;
 }