Fixed guestview sizing bug that resulted in incorrect <webview> sizing on the signin page.

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"
@@ skipping 322 matching lines @@
   void SendQueuedEvents();
 
   void CompleteInit(scoped_ptr<base::DictionaryValue> create_params,
                     const WebContentsCreatedCallback& callback,
                     content::WebContents* guest_web_contents);
 
   // Dispatches the onResize event to the embedder.
   void DispatchOnResizeEvent(const gfx::Size& old_size,
                              const gfx::Size& new_size);
 
+  // Get the zoom factor for the embedder's web contents.
+  double GetEmbedderZoomFactor();
+
+  // Convert sizes in pixels from logical to physical numbers of pixels.
+  // Note that a size can consist of a fractional number of logical pixels
+  // (hence |logical_pixels| is represented as a double), but will always
+  // consist of an integral number of physical pixels (hence the return value
+  // is represented as an int).
+  int LogicalPixelsToPhysicalPixels(double logical_pixels);
+
+  // Convert sizes in pixels from physical to logical numbers of pixels.
+  // Note that a size can consist of a fractional number of logical pixels
+  // (hence the return value is represented as a double), but will always
+  // consist of an integral number of physical pixels (hence |physical_pixels|
+  // is represented as an int).
+  double PhysicalPixelsToLogicalPixels(int physical_pixels);
+
   void SetUpSizing(const base::DictionaryValue& params);
 
   void StartTrackingEmbedderZoomLevel();
   void StopTrackingEmbedderZoomLevel();
 
   static void RegisterGuestViewTypes();
 
   // This guest tracks the lifetime of the WebContents specified by
   // |owner_web_contents_|. If |owner_web_contents_| is destroyed then this
   // guest will also self-destruct.
@@ skipping 68 matching lines @@
   // 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_