Optimize for TouchStart responsiveness

content/renderer/render_frame_impl.cc

 // Copyright 2013 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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/debug/asan_invalid_access.h"
 #include "base/debug/dump_without_crashing.h"
 #include "base/i18n/char_iterator.h"
 #include "base/metrics/histogram.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "cc/base/switches.h"
+#include "components/scheduler/renderer/renderer_scheduler.h"
 #include "content/child/appcache/appcache_dispatcher.h"
 #include "content/child/permissions/permission_dispatcher.h"
 #include "content/child/plugin_messages.h"
 #include "content/child/quota_dispatcher.h"
 #include "content/child/request_extra_data.h"
 #include "content/child/service_worker/service_worker_handle_reference.h"
 #include "content/child/service_worker/service_worker_network_provider.h"
 #include "content/child/service_worker/service_worker_provider_context.h"
 #include "content/child/service_worker/web_service_worker_provider_impl.h"
 #include "content/child/v8_value_converter_impl.h"
@@ skipping 1104 matching lines @@
 #endif
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void RenderFrameImpl::OnNavigate(
     const CommonNavigationParams& common_params,
     const StartNavigationParams& start_params,
     const RequestNavigationParams& request_params) {
+  RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
+  // Can be NULL in tests.
+  if (render_thread_impl)
+      render_thread_impl->GetRendererScheduler()->OnPageLoadStarted();
   DCHECK(!base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableBrowserSideNavigation));
   TRACE_EVENT2("navigation", "RenderFrameImpl::OnNavigate", "id", routing_id_,
                "url", common_params.url.possibly_invalid_spec());
   NavigateInternal(common_params, start_params, request_params,
                    scoped_ptr<StreamOverrideParameters>());
 }
 
 void RenderFrameImpl::NavigateToSwappedOutURL() {
   // We use loadRequest instead of loadHTMLString because the former commits
@@ skipping 1631 matching lines @@
       RenderFrameObserver, observers_,
       DidCommitProvisionalLoad(is_new_navigation,
                                navigation_state->WasWithinSamePage()));
 
   if (!frame->parent()) {  // Only for top frames.
     RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
     if (render_thread_impl) {  // Can be NULL in tests.
       render_thread_impl->histogram_customizer()->
           RenderViewNavigatedToHost(GURL(GetLoadingUrl()).host(),
                                     RenderView::GetRenderViewCount());
+      render_thread_impl->GetRendererScheduler()->OnPageLoadStarted();
     }
   }
 
   // Remember that we've already processed this request, so we don't update
   // the session history again.  We do this regardless of whether this is
   // a session history navigation, because if we attempted a session history
   // navigation without valid HistoryItem state, WebCore will think it is a
   // new navigation.
   navigation_state->set_request_committed(true);
 
@@ skipping 2292 matching lines @@
   mojo::ServiceProviderPtr service_provider;
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From(url);
   mojo_shell_->ConnectToApplication(request.Pass(), GetProxy(&service_provider),
                                     nullptr, nullptr,
                                     base::Bind(&OnGotContentHandlerID));
   return service_provider.Pass();
 }
 
 }  // namespace content