Add/improve tracing in navigation.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 3075 matching lines @@
   is_loading_ = is_loading;
   waiting_for_response_ = is_loading;
   is_load_to_different_document_ = to_different_document;
 
   if (delegate_)
     delegate_->LoadingStateChanged(this, to_different_document);
   NotifyNavigationStateChanged(INVALIDATE_TYPE_LOAD);
 
   std::string url = (details ? details->url.possibly_invalid_spec() : "NULL");
   if (is_loading) {
-    TRACE_EVENT_ASYNC_BEGIN1("browser", "WebContentsImpl Loading", this,
-                             "URL", url);
+    TRACE_EVENT_ASYNC_BEGIN1("browser,navigation", "WebContentsImpl Loading",
+                             this, "URL", url);
     FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                       DidStartLoading(render_view_host));
   } else {
-    TRACE_EVENT_ASYNC_END1("browser", "WebContentsImpl Loading", this,
-                           "URL", url);
+    TRACE_EVENT_ASYNC_END1("browser,navigation", "WebContentsImpl Loading",
+                           this, "URL", url);
     FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                       DidStopLoading(render_view_host));
   }
 
   // TODO(avi): Remove. http://crbug.com/170921
   int type = is_loading ? NOTIFICATION_LOAD_START : NOTIFICATION_LOAD_STOP;
   NotificationDetails det = NotificationService::NoDetails();
   if (details)
       det = Details<LoadNotificationDetails>(details);
   NotificationService::current()->Notify(
@@ skipping 907 matching lines @@
 NavigationEntry*
     WebContentsImpl::GetLastCommittedNavigationEntryForRenderManager() {
   return controller_.GetLastCommittedEntry();
 }
 
 bool WebContentsImpl::CreateRenderViewForRenderManager(
     RenderViewHost* render_view_host,
     int opener_route_id,
     int proxy_routing_id,
     bool for_main_frame_navigation) {
-  TRACE_EVENT0("browser", "WebContentsImpl::CreateRenderViewForRenderManager");
+  TRACE_EVENT0("browser,navigation",
+               "WebContentsImpl::CreateRenderViewForRenderManager");
   // Can be NULL during tests.
   RenderWidgetHostViewBase* rwh_view;
   // TODO(kenrb): RenderWidgetHostViewChildFrame special casing is temporary
   // until RenderWidgetHost is attached to RenderFrameHost. We need to special
   // case this because RWH is still a base class of RenderViewHost, and child
   // frame RWHVs are unique in that they do not have their own WebContents.
   if (!for_main_frame_navigation) {
     RenderWidgetHostViewChildFrame* rwh_view_child =
         new RenderWidgetHostViewChildFrame(render_view_host);
     rwh_view = rwh_view_child;
@@ skipping 27 matching lines @@
       render_widget_host->WasResized();
   }
 #endif
 
   return true;
 }
 
 bool WebContentsImpl::CreateRenderFrameForRenderManager(
     RenderFrameHost* render_frame_host,
     int parent_routing_id) {
-  TRACE_EVENT0("browser", "WebContentsImpl::CreateRenderFrameForRenderManager");
+  TRACE_EVENT0("browser,navigation",
+               "WebContentsImpl::CreateRenderFrameForRenderManager");
 
   RenderFrameHostImpl* rfh =
       static_cast<RenderFrameHostImpl*>(render_frame_host);
   if (!rfh->CreateRenderFrame(parent_routing_id))
     return false;
 
   // TODO(nasko): When RenderWidgetHost is owned by RenderFrameHost, the passed
   // RenderFrameHost will have to be associated with the appropriate
   // RenderWidgetHostView or a new one should be created here.
 
@@ skipping 153 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content