Zoom Extension API

chrome/browser/ui/zoom/zoom_controller.h

Index: chrome/browser/ui/zoom/zoom_controller.h
diff --git a/chrome/browser/ui/zoom/zoom_controller.h b/chrome/browser/ui/zoom/zoom_controller.h
index 3c427a716d6956b4603ee54f1d1fe67dd4780985..c86d10f94ea7d7a07830e7a8a6294e9120450b90 100644
--- a/chrome/browser/ui/zoom/zoom_controller.h
+++ b/chrome/browser/ui/zoom/zoom_controller.h
@@ -11,6 +11,7 @@
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
+#include "extensions/common/extension.h"
 
 class ZoomObserver;
 
@@ -32,8 +33,19 @@ class ZoomController : public content::WebContentsObserver,
   // Returns which image should be loaded for the current zoom level.
   int GetResourceForZoomLevel() const;
 
+  // Gets an extensoin from |zoom_extension_map_| by zoom ID.
+  const extensions::Extension* GetExtensionById(int zoom_id) const;
+
+  int last_zoom_id() const;
+
   void set_observer(ZoomObserver* observer) { observer_ = observer; }
 
+  // Sets the zoom level through WebContents::SetZoomLevel(), associates
+  // |extension| with that zoom change's zoom ID, and returns the zoom ID.
+  int SetZoomLevelByExtension(
+      double zoom_level,
+      scoped_refptr<const extensions::Extension> extension);
+
   // content::WebContentsObserver overrides:
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
@@ -51,6 +63,8 @@ class ZoomController : public content::WebContentsObserver,
   // meaning the change should apply to ~all sites. If it is not empty, the
   // change only affects sites with the given host.
   void UpdateState(const std::string& host);
+  void UpdateState(const std::string& host, int zoom_id,
+                   bool is_temporary_zoom);
 
   // The current zoom percentage.
   int zoom_percent_;
@@ -58,6 +72,14 @@ class ZoomController : public content::WebContentsObserver,
   // Used to access the default zoom level preference.
   DoublePrefMember default_zoom_level_;
 
+  // Used to keep track of which extensions initiated which zoom changes.
+  typedef std::map<int, scoped_refptr<
+                          const extensions::Extension> > ZoomExtensionMap;
+  ZoomExtensionMap zoom_extension_map_;
+
+  // Keeps track of the zoom_id of the last zoom change that took effect.
+  int last_zoom_id_;
+
   // Observer receiving notifications on state changes.
   ZoomObserver* observer_;