PlzNavigate: implement process reuse for ServiceWorkers

content/browser/renderer_host/render_process_host_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 293 matching lines @@
   void OnAudioStreamRemoved() override;
   int get_audio_stream_count_for_testing() const { return audio_stream_count_; }
 
   // Sets the global factory used to create new RenderProcessHosts.  It may be
   // nullptr, in which case the default RenderProcessHost will be created (this
   // is the behavior if you don't call this function).  The factory must be set
   // back to nullptr before it's destroyed; ownership is not transferred.
   static void set_render_process_host_factory(
       const RenderProcessHostFactory* rph_factory);
 
+  // Tracks which sites frames are hosted in which RenderProcessHosts.
+  static void AddFrameWithSite(BrowserContext* browser_context,

[clamy, 2017/05/04 16:01:01]

Due to the split RenderProcessHostImpl/MockRenderProcessHost I had to make all
these methods static since I couldn't store state in the RenderProcessHostImpl
itself.

+                               RenderProcessHost* render_process_host,
+                               const GURL& site_url);

[Charlie Reis, 2017/05/15 03:41:52]

Note: If we call these parameters |site_url|, then we should expect them to
already be site URLs when passed in (rather than calling GetSiteURL internally).
 That might be easier if we track last_committed_site_url_ on RFHI.

[clamy, 2017/05/16 14:50:46]

Done.

+  static void RemoveFrameWithSite(BrowserContext* browser_context,
+                                  RenderProcessHost* render_process_host,
+                                  const GURL& site_url);
+
+  // Tracks which sites navigations are expected to commit in which
+  // RenderProcessHosts.
+  static void AddExpectedNavigationToSite(
+      BrowserContext* browser_context,
+      RenderProcessHost* render_process_host,
+      const GURL& site_url);
+  static void RemoveExpectedNavigationToSite(
+      BrowserContext* browser_context,
+      RenderProcessHost* render_process_host,
+      const GURL& site_url);
+
  protected:
   // A proxy for our IPC::Channel that lives on the IO thread.
   std::unique_ptr<IPC::ChannelProxy> channel_;
 
   // True if fast shutdown has been performed on this RPH.
   bool fast_shutdown_started_;
 
   // True if we've posted a DeleteTask and will be deleted soon.
   bool deleting_soon_;
 
@@ skipping 78 matching lines @@
   void ProcessDied(bool already_dead, RendererClosedDetails* known_details);
 
   // GpuSwitchingObserver implementation.
   void OnGpuSwitched() override;
 
   // Returns the default subframe RenderProcessHost to use for |site_instance|.
   static RenderProcessHost* GetDefaultSubframeProcessHost(
       BrowserContext* browser_context,
       SiteInstanceImpl* site_instance);
 
+  // Returns a RenderProcessHost* that is rendering |site_url| in one of its
+  // frames, or that is expecting a navigation to |site_url|.
+  static RenderProcessHost* FindReusableProcessHostForSite(
+      BrowserContext* browser_context,
+      const GURL& site_url);
+
 #if BUILDFLAG(ENABLE_WEBRTC)
   void OnRegisterAecDumpConsumer(int id);
   void OnUnregisterAecDumpConsumer(int id);
   void RegisterAecDumpConsumerOnUIThread(int id);
   void UnregisterAecDumpConsumerOnUIThread(int id);
   void EnableAecDumpForId(const base::FilePath& file, int id);
   // Sends |file_for_transit| to the render process.
   void SendAecDumpFileToRenderer(int id,
                                  IPC::PlatformFileForTransit file_for_transit);
   void SendDisableAecDumpToRenderer();
@@ skipping 228 matching lines @@
   FrameSinkProviderImpl frame_sink_provider_;
 
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_