Move ZoomController out of ChromeWebViewGuestDelegate.

extensions/browser/guest_view/guest_view_base.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 
 #include <queue>
 
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
+#include "components/ui/zoom/zoom_observer.h"
 #include "content/public/browser/browser_plugin_guest_delegate.h"
 #include "content/public/browser/render_process_host_observer.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "extensions/common/guest_view/guest_view_constants.h"
 
 struct RendererContentSettingRules;
 
 namespace extensions {
 
 // A GuestViewBase is the base class browser-side API implementation for a
 // <*view> tag. GuestViewBase maintains an association between a guest
 // WebContents and an owner WebContents. It receives events issued from
 // the guest and relays them to the owner. GuestViewBase tracks the lifetime
 // of its owner. A GuestViewBase's owner is referred to as an embedder if
 // it is attached to a container within the owner's WebContents.
 class GuestViewBase : public content::BrowserPluginGuestDelegate,
                       public content::WebContentsDelegate,
-                      public content::WebContentsObserver {
+                      public content::WebContentsObserver,
+                      public ui_zoom::ZoomObserver {
  public:
   class Event {
    public:
     Event(const std::string& name, scoped_ptr<base::DictionaryValue> args);
     ~Event();
 
     const std::string& name() const { return name_; }
 
     scoped_ptr<base::DictionaryValue> GetArguments();
 
@@ skipping 197 matching lines @@
   void ElementSizeChanged(const gfx::Size& old_size,
                           const gfx::Size& new_size) final;
   content::WebContents* GetOwnerWebContents() const final;
   void GuestSizeChanged(const gfx::Size& old_size,
                         const gfx::Size& new_size) final;
   void RegisterDestructionCallback(const DestructionCallback& callback) final;
   void WillAttach(content::WebContents* embedder_web_contents,
                   int browser_plugin_instance_id,
                   bool is_full_page_plugin) final;
 
+  // ui_zoom::ZoomObserver implementation.
+  void OnZoomChanged(
+      const ui_zoom::ZoomController::ZoomChangedEventData& data) override;
+
   // Dispatches an event |event_name| to the embedder with the |event| fields.
   void DispatchEventToEmbedder(Event* event);
 
  protected:
   GuestViewBase(content::BrowserContext* browser_context,
                 content::WebContents* owner_web_contents,
                 int guest_instance_id);
 
   ~GuestViewBase() override;
 
  private:
   class OwnerLifetimeObserver;
 
   class OpenerLifetimeObserver;
 
   void SendQueuedEvents();
 
   void CompleteInit(const std::string& owner_extension_id,
                     const WebContentsCreatedCallback& callback,
                     content::WebContents* guest_web_contents);
 
+  void StartObservingOwnersZoomController();
+  void StopObservingOwnersZoomControllerIfNecessary();
+
   static void RegisterGuestViewTypes();
 
   // WebContentsObserver implementation.
   void DidStopLoading(content::RenderViewHost* render_view_host) final;
   void RenderViewReady() final;
   void WebContentsDestroyed() final;
 
   // WebContentsDelegate implementation.
   void ActivateContents(content::WebContents* contents) final;
   void DeactivateContents(content::WebContents* contents) final;
@@ skipping 65 matching lines @@
 
   // The maximum size constraints of the container element in autosize mode.
   gfx::Size max_auto_size_;
 
   // The minimum size constraints of the container element in autosize mode.
   gfx::Size min_auto_size_;
 
   // Whether the guest view is inside a plugin document.
   bool is_full_page_plugin_;
 
+  bool observing_owners_zoom_controller_;
+
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_