Revert of Ensure RenderFrameHost & NavigationHandle are not destroyed during commit

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index c19ed16a8bec64b641637a41429ac409231d4734..252a2e03d3990a4fc2263647aa8439275a4fb039 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -211,10 +211,6 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
       bool same_page,
       RenderFrameHostImpl* render_frame_host);
 
-  // TODO(clamy): Remove this once enough data has been gathered for
-  // crbug.com/589365.
-  void set_is_in_commit(bool is_in_commit) { is_in_commit_ = is_in_commit; }
-
  private:
   friend class NavigationHandleImplTest;
 
@@ -296,12 +292,6 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   // corresponding ServiceWorkerNetworkProvider is created in the renderer.
   scoped_ptr<ServiceWorkerNavigationHandle> service_worker_handle_;
 
-  // True if the RenderFrameHost that owns the NavigationHandle is in the
-  // process of committing a navigation.  This is temporary to help pinpoint
-  // the cause of crbug.com/589365.
-  // TODO(clamy): Remove once enough data has been gathered.
-  bool is_in_commit_;
-
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);
 };