Allow MainThreadEventQueue to call the RenderWidget directly.

content/renderer/idle_user_detector.cc

Index: content/renderer/idle_user_detector.cc
diff --git a/content/renderer/idle_user_detector.cc b/content/renderer/idle_user_detector.cc
index 43979cfb722ebbbb322b822c0d665c78a998475d..4414b9638afd3890978d68137073e086bb11a1ab 100644
--- a/content/renderer/idle_user_detector.cc
+++ b/content/renderer/idle_user_detector.cc
@@ -12,11 +12,9 @@
 namespace content {
 
 IdleUserDetector::IdleUserDetector(RenderView* render_view)
-    : RenderViewObserver(render_view){
-}
+    : RenderViewObserver(render_view) {}
 
-IdleUserDetector::~IdleUserDetector() {
-}
+IdleUserDetector::~IdleUserDetector() {}
 
 bool IdleUserDetector::OnMessageReceived(const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(IdleUserDetector, message)
@@ -25,11 +23,7 @@ bool IdleUserDetector::OnMessageReceived(const IPC::Message& message) {
   return false;
 }
 
-void IdleUserDetector::OnHandleInputEvent(
-    const blink::WebInputEvent* event,
-    const std::vector<const blink::WebInputEvent*>& coalesced_events,
-    const ui::LatencyInfo& latency_info,
-    InputEventDispatchType dispatch_type) {
+void IdleUserDetector::ActivityDetected() {
   if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     RenderThreadImpl* render_thread = RenderThreadImpl::current();
     if (render_thread != NULL) {
@@ -38,8 +32,14 @@ void IdleUserDetector::OnHandleInputEvent(
   }
 }
 
-void IdleUserDetector::OnDestruct() {
-  delete this;
+void IdleUserDetector::OnHandleInputEvent(
+    const blink::WebInputEvent* event,
+    const std::vector<const blink::WebInputEvent*>& coalesced_events,
+    const ui::LatencyInfo& latency_info,
+    InputEventDispatchType dispatch_type) {
+  ActivityDetected();
 }
 
+void IdleUserDetector::OnDestruct() {}
+
 }  // namespace content