Move LoadProgressTracker to the browser process.

content/browser/web_contents/web_contents_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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 322 matching lines @@
   virtual bool Send(IPC::Message* message) OVERRIDE;
 
   // RenderFrameHostDelegate ---------------------------------------------------
   virtual bool OnMessageReceived(RenderFrameHost* render_frame_host,
                                  const IPC::Message& message) OVERRIDE;
   virtual const GURL& GetMainFrameLastCommittedURL() const OVERRIDE;
   virtual void RenderFrameCreated(RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void RenderFrameDeleted(RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void DidStartLoading(RenderFrameHost* render_frame_host,
                                bool to_different_document) OVERRIDE;
-  virtual void DidStopLoading(RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void SwappedOut(RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void WorkerCrashed(RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
                                const ContextMenuParams& params) OVERRIDE;
   virtual void RunJavaScriptMessage(RenderFrameHost* render_frame_host,
                                     const base::string16& message,
                                     const base::string16& default_prompt,
                                     const GURL& frame_url,
                                     JavaScriptMessageType type,
                                     IPC::Message* reply_msg) OVERRIDE;
@@ skipping 28 matching lines @@
   virtual void UpdateTitle(RenderViewHost* render_view_host,
                            int32 page_id,
                            const base::string16& title,
                            base::i18n::TextDirection title_direction) OVERRIDE;
   virtual void UpdateEncoding(RenderViewHost* render_view_host,
                               const std::string& encoding) OVERRIDE;
   virtual void UpdateTargetURL(int32 page_id, const GURL& url) OVERRIDE;
   virtual void Close(RenderViewHost* render_view_host) OVERRIDE;
   virtual void RequestMove(const gfx::Rect& new_bounds) OVERRIDE;
   virtual void DidCancelLoading() OVERRIDE;
-  virtual void DidChangeLoadProgress(double progress) OVERRIDE;
   virtual void DocumentAvailableInMainFrame(
       RenderViewHost* render_view_host) OVERRIDE;
   virtual void RouteCloseEvent(RenderViewHost* rvh) OVERRIDE;
   virtual void RouteMessageEvent(
       RenderViewHost* rvh,
       const ViewMsg_PostMessage_Params& params) OVERRIDE;
   virtual bool AddMessageToConsole(int32 level,
                                    const base::string16& message,
                                    int32 line_no,
                                    const base::string16& source_id) OVERRIDE;
@@ skipping 304 matching lines @@
   void OnDidLoadResourceFromMemoryCache(const GURL& url,
                                         const std::string& security_info,
                                         const std::string& http_request,
                                         const std::string& mime_type,
                                         ResourceType::Type resource_type);
   void OnDidDisplayInsecureContent();
   void OnDidRunInsecureContent(const std::string& security_origin,
                                const GURL& target_url);
   void OnDocumentLoadedInFrame();
   void OnDidFinishLoad(const GURL& url);
+  void OnDidStartLoading(bool to_different_document);
+  void OnDidStopLoading();
+  void OnDidChangeLoadProgress(double load_progress);
   void OnGoToEntryAtOffset(int offset);
   void OnUpdateZoomLimits(int minimum_percent,
                           int maximum_percent,
                           bool remember);
   void OnEnumerateDirectory(int request_id, const base::FilePath& path);
 
   void OnRegisterProtocolHandler(const std::string& protocol,
                                  const GURL& url,
                                  const base::string16& title,
                                  bool user_gesture);
@@ skipping 100 matching lines @@
 
   // Finds the new RenderWidgetHost and returns it. Note that this can only be
   // called once as this call also removes it from the internal map.
   RenderWidgetHostView* GetCreatedWidget(int route_id);
 
   // Finds the new WebContentsImpl by route_id, initializes it for
   // renderer-initiated creation, and returns it. Note that this can only be
   // called once as this call also removes it from the internal map.
   WebContentsImpl* GetCreatedWindow(int route_id);
 
+  // Tracking loading progress -------------------------------------------------
+
+  // Resets the tracking state of the current load.
+  void ResetLoadProgressState();
+
+  // Calculates the progress of the current load and notifies the delegate.
+  void SendLoadProgressChanged();
+
+  // Called once when the last frame on the page has stopped loading.
+  void DidStopLoading(RenderFrameHost* render_frame_host);
+
   // Misc non-view stuff -------------------------------------------------------
 
   // Helper functions for sending notifications.
   void NotifySwapped(RenderViewHost* old_host, RenderViewHost* new_host);
   void NotifyDisconnected();
 
   void SetEncoding(const std::string& encoding);
 
   // TODO(creis): This should take in a FrameTreeNode to know which node's
   // render manager to return.  For now, we just return the root's.
@@ skipping 110 matching lines @@
   bool waiting_for_response_;
 
   // Map of SiteInstance ID to max page ID for this tab. A page ID is specific
   // to a given tab and SiteInstance, and must be valid for the lifetime of the
   // WebContentsImpl.
   std::map<int32, int32> max_page_ids_;
 
   // The current load state and the URL associated with it.
   net::LoadStateWithParam load_state_;
   base::string16 load_state_host_;
+
+  // LoadingProgressMap maps FrameTreeNode IDs to a double representing that
+  // frame's completion (from 0 to 1).
+  typedef base::hash_map<int64, double> LoadingProgressMap;
+  LoadingProgressMap loading_progresses_;
+  double loading_total_progress_;
+
+  base::TimeTicks loading_last_progress_update_;
+
+  base::WeakPtrFactory<WebContentsImpl> loading_weak_factory_;
+
+  // Counter to track how many frames have sent start notifications but not
+  // stop notifications.
+  int loading_frames_in_progress_;

[Charlie Reis, 2014/05/07 23:51:00]

Are we updating this if the process crashes?  I'm curious if the throbber will
continue to spin if the renderer dies before hearing DidStopLoading (e.g., with
a slow subframe).

[Avi (use Gerrit), 2014/05/13 21:08:08]

What happens today? Today we'll get a FrameHostMsg_DidStartLoading without a
FrameHostMsg_DidStopLoading, but WebContentsImpl::RenderViewTerminated does do
some cleanup by calling SetIsLoading(false).

I will address this.

BTW, what does it mean to be "render process crashed" in the future, when
there's more than one render process servicing a page?

[Charlie Reis, 2014/05/13 22:44:37]

Yes, that's probably the reason the throbber stops spinning.
Right, the whole tab won't necessarily be a sad tab when one of its renderer
processes dies.  We partly deal with this in FrameTree::RenderProcessGone, which
is called just before WebContentsImpl::RenderViewTerminated.  That clears out
any subframes of RenderFrameHosts with the crashed RenderViewHost, leaving a sad
frame the RenderFrameHosts themselves.  (We may end up needing to update
RenderViewTerminated further, though.)

+
   // Upload progress, for displaying in the status bar.
   // Set to zero when there is no significant upload happening.
   uint64 upload_size_;
   uint64 upload_position_;
 
   // Data for current page -----------------------------------------------------
 
   // When a title cannot be taken from any entry, this title will be used.
   base::string16 page_title_when_no_navigation_entry_;
 
@@ skipping 136 matching lines @@
 
   // Whether the last JavaScript dialog shown was suppressed. Used for testing.
   bool last_dialog_suppressed_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_