views: Make view::Views::GetPreferredSize() const.

ui/views/controls/webview/webview.cc

 // 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.
 
 #include "ui/views/controls/webview/webview.h"
 
 #include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 206 matching lines @@
 gfx::NativeViewAccessible WebView::GetNativeViewAccessible() {
   if (web_contents()) {
     content::RenderWidgetHostView* host_view =
         web_contents()->GetRenderWidgetHostView();
     if (host_view)
       return host_view->GetNativeViewAccessible();
   }
   return View::GetNativeViewAccessible();
 }
 
-gfx::Size WebView::GetPreferredSize() {
+gfx::Size WebView::GetPreferredSize() const {
   if (preferred_size_ == gfx::Size())
     return View::GetPreferredSize();
   else
     return preferred_size_;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebView, content::WebContentsDelegate implementation:
 
 void WebView::WebContentsFocused(content::WebContents* web_contents) {
@@ skipping 116 matching lines @@
   if (!contents) {
     content::WebContents::CreateParams create_params(
         browser_context, NULL);
     return content::WebContents::Create(create_params);
   }
 
   return contents;
 }
 
 }  // namespace views