Move ZoomObserver, ZoomController and ZoomEventManager to components/.

extensions/browser/ui/zoom/zoom_controller.h

Index: extensions/browser/ui/zoom/zoom_controller.h
diff --git a/chrome/browser/ui/zoom/zoom_controller.h b/extensions/browser/ui/zoom/zoom_controller.h
similarity index 93%
rename from chrome/browser/ui/zoom/zoom_controller.h
rename to extensions/browser/ui/zoom/zoom_controller.h
index 7dad4ad35ec9f9b6e3336d02920f231fdbc01442..e57e62e3dc3648d1fea48bac96dc532236ffef4c 100644
--- a/chrome/browser/ui/zoom/zoom_controller.h
+++ b/extensions/browser/ui/zoom/zoom_controller.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_
-#define CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_
+#ifndef EXTENSIONS_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_
+#define EXTENSIONS_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -14,7 +14,7 @@
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
-class ZoomObserver;
+class ZoomControllerTest;
 
 namespace content {
 class WebContents;
@@ -22,7 +22,7 @@ class WebContents;
 
 namespace extensions {
 class Extension;
-}  // namespace extensions
+class ZoomObserver;
 
 // Per-tab class to manage zoom changes and the Omnibox zoom icon.
 class ZoomController : public content::WebContentsObserver,
@@ -48,6 +48,12 @@ class ZoomController : public content::WebContentsObserver,
     ZOOM_MODE_DISABLED,
   };
 
+  enum RelativeZoom {
+    ZOOM_BELOW_DEFAULT_ZOOM,
+    ZOOM_AT_DEFAULT_ZOOM,
+    ZOOM_ABOVE_DEFAULT_ZOOM
+  };
+
   struct ZoomChangedEventData {
     ZoomChangedEventData(content::WebContents* web_contents,
                          double old_zoom_level,
@@ -81,7 +87,7 @@ class ZoomController : public content::WebContentsObserver,
   bool IsAtDefaultZoom() const;
 
   // Returns which image should be loaded for the current zoom level.
-  int GetResourceForZoomLevel() const;
+  RelativeZoom GetZoomRelativeToDefault() const;
 
   const extensions::Extension* last_extension() const {
     return last_extension_.get();
@@ -130,7 +136,7 @@ class ZoomController : public content::WebContentsObserver,
 
  private:
   friend class content::WebContentsUserData<ZoomController>;
-  friend class ZoomControllerTest;
+  friend class ::ZoomControllerTest;
 
   void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change);
 
@@ -165,4 +171,6 @@ class ZoomController : public content::WebContentsObserver,
   DISALLOW_COPY_AND_ASSIGN(ZoomController);
 };
 
-#endif  // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_