Pass the render process id to the FrameNavigationState.

chrome/browser/extensions/api/web_navigation/frame_navigation_state.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 CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_FRAME_NAVIGATION_STATE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_FRAME_NAVIGATION_STATE_H_
 
 #include <map>
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "googleurl/src/gurl.h"
 
 namespace extensions {
 
 // Tracks the navigation state of all frames in a given tab currently known to
 // the webNavigation API. It is mainly used to track in which frames an error
 // occurred so no further events for this frame are being sent.
 class FrameNavigationState {
  public:
-  typedef std::set<int64>::const_iterator const_iterator;
+  // A frame is uniquely identified by its frame ID (int64) and the render
+  // process ID (int). We use the render process ID instead of e.g. a pointer
+  // to the RVH so we don't depend on the lifetime of the RVH.
+  typedef std::pair<int64, int> FrameID;

[Matt Perry, 2012/07/23 21:28:10]

How much more work would it be to define your own struct with named variables?
"first" and "second" could easily get confusing as to which is which.

[jochen (gone - plz use gerrit), 2012/07/23 22:04:05]

not too much. I'd have to specialize the std::less template, so I can insert it
into maps and sets. wdyt?

[Matt Perry, 2012/07/23 22:31:29]

Yeah I think that's worth it. Or maybe just define operator<

+  typedef std::set<FrameID>::const_iterator const_iterator;
+
+  static FrameID kInvalidFrameID;
 
   FrameNavigationState();
   ~FrameNavigationState();
 
   // Use these to iterate over all frame IDs known by this object.
   const_iterator begin() const { return frame_ids_.begin(); }
   const_iterator end() const { return frame_ids_.end(); }
 
   // True if navigation events for the given frame can be sent.
-  bool CanSendEvents(int64 frame_id) const;
+  bool CanSendEvents(FrameID frame_id) const;
 
   // True if in general webNavigation events may be sent for the given URL.
   bool IsValidUrl(const GURL& url) const;
 
   // Starts to track a frame identified by its |frame_id| showing the URL |url|.
-  void TrackFrame(int64 frame_id,
+  void TrackFrame(FrameID frame_id,
                   const GURL& url,
                   bool is_main_frame,
                   bool is_error_page);
 
   // Update the URL associated with a given frame.
-  void UpdateFrame(int64 frame_id, const GURL& url);
+  void UpdateFrame(FrameID frame_id, const GURL& url);
 
   // Returns true if |frame_id| is a known frame.
-  bool IsValidFrame(int64 frame_id) const;
+  bool IsValidFrame(FrameID frame_id) const;
 
   // Returns the URL corresponding to a tracked frame given by its |frame_id|.
-  GURL GetUrl(int64 frame_id) const;
+  GURL GetUrl(FrameID frame_id) const;
 
   // True if the frame given by its |frame_id| is the main frame of its tab.
-  bool IsMainFrame(int64 frame_id) const;
+  bool IsMainFrame(FrameID frame_id) const;
 
   // Returns the frame ID of the main frame, or -1 if the frame ID is not
   // known.
-  int64 GetMainFrameID() const;
+  FrameID GetMainFrameID() const;
 
   // Marks a frame as in an error state, i.e. the onErrorOccurred event was
   // fired for this frame, and no further events should be sent for it.
-  void SetErrorOccurredInFrame(int64 frame_id);
+  void SetErrorOccurredInFrame(FrameID frame_id);
 
   // True if the frame is marked as being in an error state.
-  bool GetErrorOccurredInFrame(int64 frame_id) const;
+  bool GetErrorOccurredInFrame(FrameID frame_id) const;
 
   // Marks a frame as having finished its last navigation, i.e. the onCompleted
   // event was fired for this frame.
-  void SetNavigationCompleted(int64 frame_id);
+  void SetNavigationCompleted(FrameID frame_id);
 
   // True if the frame is currently not navigating.
-  bool GetNavigationCompleted(int64 frame_id) const;
+  bool GetNavigationCompleted(FrameID frame_id) const;
 
   // Marks a frame as having committed its navigation, i.e. the onCommitted
   // event was fired for this frame.
-  void SetNavigationCommitted(int64 frame_id);
+  void SetNavigationCommitted(FrameID frame_id);
 
   // True if the frame has committed its navigation.
-  bool GetNavigationCommitted(int64 frame_id) const;
+  bool GetNavigationCommitted(FrameID frame_id) const;
 
   // Marks a frame as redirected by the server.
-  void SetIsServerRedirected(int64 frame_id);
+  void SetIsServerRedirected(FrameID frame_id);
 
   // True if the frame was redirected by the server.
-  bool GetIsServerRedirected(int64 frame_id) const;
+  bool GetIsServerRedirected(FrameID frame_id) const;
 
 #ifdef UNIT_TEST
   static void set_allow_extension_scheme(bool allow_extension_scheme) {
     allow_extension_scheme_ = allow_extension_scheme;
   }
 #endif
 
  private:
   struct FrameState {
     bool error_occurred;  // True if an error has occurred in this frame.
     bool is_main_frame;  // True if this is a main frame.
     bool is_navigating;  // True if there is a navigation going on.
     bool is_committed;  // True if the navigation is already committed.
     bool is_server_redirected;  // True if a server redirect happened.
     GURL url;  // URL of this frame.
   };
-  typedef std::map<int64, FrameState> FrameIdToStateMap;
+  typedef std::map<FrameID, FrameState> FrameIdToStateMap;
 
   // Tracks the state of known frames.
   FrameIdToStateMap frame_state_map_;
 
   // Set of all known frames.
-  std::set<int64> frame_ids_;
+  std::set<FrameID> frame_ids_;
 
   // The current main frame.
-  int64 main_frame_id_;
+  FrameID main_frame_id_;
 
   // If true, also allow events from chrome-extension:// URLs.
   static bool allow_extension_scheme_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameNavigationState);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_FRAME_NAVIGATION_STATE_H_