Disabled pinch zooming in non-browser Aura windows.

ui/views/controls/webview/webview.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 UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 #define UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents_delegate.h"
@@ skipping 80 matching lines @@
   virtual bool IsFocusable() const OVERRIDE;
   virtual void OnFocus() OVERRIDE;
   virtual void AboutToRequestFocusFromTabTraversal(bool reverse) OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
   // Overridden from content::WebContentsDelegate:
   virtual void WebContentsFocused(content::WebContents* web_contents) OVERRIDE;
   virtual bool EmbedsFullscreenWidget() const OVERRIDE;
+  virtual bool PreHandleGestureEvent(
+      content::WebContents* source,
+      const blink::WebGestureEvent& event) OVERRIDE;
 
   // Overridden from content::WebContentsObserver:
   virtual void RenderViewHostChanged(
       content::RenderViewHost* old_host,
       content::RenderViewHost* new_host) OVERRIDE;
   virtual void WebContentsDestroyed(
       content::WebContents* web_contents) OVERRIDE;
   virtual void DidShowFullscreenWidget(int routing_id) OVERRIDE;
   virtual void DidDestroyFullscreenWidget(int routing_id) OVERRIDE;
   // Workaround for MSVC++ linker bug/feature that requires
@@ skipping 21 matching lines @@
   content::BrowserContext* browser_context_;
   bool allow_accelerators_;
   gfx::Size preferred_size_;
 
   DISALLOW_COPY_AND_ASSIGN(WebView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_