Remove ViewMsg_SetZoomLevel

content/browser/host_zoom_map_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_HOST_ZOOM_MAP_IMPL_H_
 #define CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/supports_user_data.h"
 #include "base/synchronization/lock.h"
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 namespace content {
 
+class WebContentsImpl;
+
 // HostZoomMap needs to be deleted on the UI thread because it listens
 // to notifications on there (and holds a NotificationRegistrar).
 class CONTENT_EXPORT HostZoomMapImpl : public NON_EXPORTED_BASE(HostZoomMap),
                                        public NotificationObserver,
                                        public base::SupportsUserData::Data {
  public:
   HostZoomMapImpl();
   virtual ~HostZoomMapImpl();
 
   // HostZoomMap implementation:
   virtual void CopyFrom(HostZoomMap* copy) OVERRIDE;
   virtual double GetZoomLevelForHostAndScheme(
       const std::string& scheme,
       const std::string& host) const OVERRIDE;
   virtual ZoomLevelVector GetAllZoomLevels() const OVERRIDE;
   virtual void SetZoomLevelForHost(
       const std::string& host,
       double level) OVERRIDE;
   virtual void SetZoomLevelForHostAndScheme(
       const std::string& scheme,
       const std::string& host,
       double level) OVERRIDE;
   virtual double GetDefaultZoomLevel() const OVERRIDE;
   virtual void SetDefaultZoomLevel(double level) OVERRIDE;
   virtual scoped_ptr<Subscription> AddZoomLevelChangedCallback(
       const ZoomLevelChangedCallback& callback) OVERRIDE;
 
+  // Returns the current zoom level for the specified WebContents. This may
+  // be a temporary zoom level, depending on UsesTemporaryZoomLevel().
+  double GetZoomLevelForWebContents(
+      const WebContentsImpl& web_contents_impl) const;
+
+  // Sets the zoom level for this WebContents. If this WebContents is using
+  // a temporary zoom level, then level is only applied to this WebContents.
+  // Otherwise, the level will be applied on a host level.
+  void SetZoomLevelForWebContents(const WebContentsImpl& web_contents_impl,
+                                  double level);
+
+  // Sets the zoom level for the specified view. The level may be set for only
+  // this view, or for the host, depending on UsesTemporaryZoomLevel().
+  void SetZoomLevelForView(int render_process_id,
+                           int render_view_id,
+                           double level,
+                           const std::string& host);
+
+  // Returns whether the view manages its zoom level independently of other tabs
+  // displaying content from the same host.
+  bool UsesTemporaryZoomLevel(int render_process_id, int render_view_id) const;
+
+  // Sets whether the view manages its zoom level independently of other tabs
+  // displaying content from the same host, based on whether
+  // |uses_temporary_zoom_level| is true.
+  void SetUsesTemporaryZoomLevel(int render_process_id,
+                                 int render_view_id,
+                                 bool uses_temporary_zoom_level);
+
   // Returns the temporary zoom level that's only valid for the lifetime of
   // the given WebContents (i.e. isn't saved and doesn't affect other
   // WebContentses) if it exists, the default zoom level otherwise.
   //
   // This may be called on any thread.
   double GetTemporaryZoomLevel(int render_process_id,
                                int render_view_id) const;
 
   // Sets the temporary zoom level that's only valid for the lifetime of this
   // WebContents.
@@ skipping 17 matching lines @@
   // Callbacks called when zoom level changes.
   base::CallbackList<void(const ZoomLevelChange&)>
       zoom_level_changed_callbacks_;
 
   // Copy of the pref data, so that we can read it on the IO thread.
   HostZoomLevels host_zoom_levels_;
   SchemeHostZoomLevels scheme_host_zoom_levels_;
   double default_zoom_level_;
 
   struct TemporaryZoomLevel {
+    TemporaryZoomLevel(int process_id, int view_id, double level);
+    TemporaryZoomLevel(int process_id, int view_id);
+    bool operator==(const TemporaryZoomLevel& other) const;
+
     int render_process_id;
     int render_view_id;
     double zoom_level;
   };
 
   // Don't expect more than a couple of tabs that are using a temporary zoom
   // level, so vector is fine for now.
-  std::vector<TemporaryZoomLevel> temporary_zoom_levels_;
+  typedef std::vector<TemporaryZoomLevel> TemporaryZoomLevels;

[Peter Kasting, 2014/05/29 18:16:08]

Nit: Style guide says typedefs and enums go at the top of the section (this also
applies to the two typedefs higher up)

[wjmaclean, 2014/05/29 20:14:19]

Done.

+  TemporaryZoomLevels temporary_zoom_levels_;
 
   // Used around accesses to |host_zoom_levels_|, |default_zoom_level_| and
   // |temporary_zoom_levels_| to guarantee thread safety.
   mutable base::Lock lock_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(HostZoomMapImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_