Fix page zoom to be frame-centric for out-of-process frames.

content/browser/web_contents/web_contents_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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 206 matching lines @@
   // have been removed.
   void RemoveAccessibilityMode(AccessibilityMode mode);
 
   // Request a one-time snapshot of the accessibility tree without changing
   // the accessibility mode.
   using AXTreeSnapshotCallback =
       base::Callback<void(
           const ui::AXTreeUpdate&)>;
   void RequestAXTreeSnapshot(AXTreeSnapshotCallback callback);
 
+  // Set a temporary zoom level for the frames associated with this WebContents.
+  // If |is_temporary| is true, we are setting a new temporary zoom level,
+  // otherwise we are clearing a previously set temporary zoom level.
+  void SetTemporaryZoomLevel(double level, bool is_temporary);
+  // Sets the zoom level for frames associated with this WebContents.

[alexmos, 2016/04/07 01:20:56]

nit: blank line above comment might be a bit more readable (also below)

[wjmaclean, 2016/04/07 12:55:36]

Done.

+  void UpdateZoom(double level);
+  // Sets the zoom level for frames associated with this WebContents if it
+  // matches |host| and (if non-empty) |scheme|.

[alexmos, 2016/04/07 01:20:56]

nit: clarify what it means to match |host| and |scheme| - e.g., "it matches" ->
"the main frame's host and scheme matches"

[wjmaclean, 2016/04/07 12:55:36]

Done.

+  void UpdateZoomIfNecessary(const std::string& scheme,
+                             const std::string& host,
+                             double level);
+
   // WebContents ------------------------------------------------------
   WebContentsDelegate* GetDelegate() override;
   void SetDelegate(WebContentsDelegate* delegate) override;
   NavigationControllerImpl& GetController() override;
   const NavigationControllerImpl& GetController() const override;
   BrowserContext* GetBrowserContext() const override;
   const GURL& GetURL() const override;
   const GURL& GetVisibleURL() const override;
   const GURL& GetLastCommittedURL() const override;
   RenderProcessHost* GetRenderProcessHost() const override;
@@ skipping 1106 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendZone);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_