Fix an invalid cast from RenderWidgetHostViewGuest to RenderWidgetHostViewMac

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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 "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <Carbon/Carbon.h>
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
@@ skipping 79 matching lines @@
 
 using content::BrowserAccessibility;
 using content::BrowserAccessibilityManager;
 using content::EditCommand;
 using content::FrameTreeNode;
 using content::NativeWebKeyboardEvent;
 using content::RenderFrameHost;
 using content::RenderViewHost;
 using content::RenderViewHostImpl;
 using content::RenderWidgetHostImpl;
+using content::RenderWidgetHostView;
 using content::RenderWidgetHostViewMac;
 using content::RenderWidgetHostViewMacEditCommandHelper;
 using content::TextInputClientMac;
 using content::WebContents;
 using content::WebGestureEventBuilder;
 using content::WebMouseEventBuilder;
 using content::WebMouseWheelEventBuilder;
 using blink::WebInputEvent;
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 using blink::WebGestureEvent;
 
 namespace {
 
 // Whether a keyboard event has been reserved by OSX.
 BOOL EventIsReservedBySystem(NSEvent* event) {
   content::SystemHotkeyHelperMac* helper =
       content::SystemHotkeyHelperMac::GetInstance();
   return helper->map()->IsEventReserved(event);
 }
 
-RenderWidgetHostViewMac* GetRenderWidgetHostViewToUse(
+RenderWidgetHostView* GetRenderWidgetHostViewToUse(
     RenderWidgetHostViewMac* render_widget_host_view) {
   WebContents* web_contents = render_widget_host_view->GetWebContents();
   if (!web_contents)
     return render_widget_host_view;
   content::BrowserPluginGuestManager* guest_manager =
       web_contents->GetBrowserContext()->GetGuestManager();
   if (!guest_manager)
     return render_widget_host_view;
   content::WebContents* guest =
       guest_manager->GetFullPageGuest(web_contents);
   if (!guest)
     return render_widget_host_view;
-  return static_cast<RenderWidgetHostViewMac*>(
-      guest->GetRenderWidgetHostView());
+  return guest->GetRenderWidgetHostView();
 }
 
 }  // namespace
 
 // These are not documented, so use only after checking -respondsToSelector:.
 @interface NSApplication (UndocumentedSpeechMethods)
 - (void)speakString:(NSString*)string;
 - (void)stopSpeaking:(id)sender;
 - (BOOL)isSpeaking;
 @end
@@ skipping 3274 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end