Move handling of DraggableRegionsChanged notification from "view" to "frame".

third_party/WebKit/Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 190 matching lines @@
       WebEventListenerClass event_class) const override {
     return WebEventListenerProperties::kNothing;
   }
   void UpdateEventRectsForSubframeIfNecessary(LocalFrame* frame) override {}
   void SetHasScrollEventHandlers(LocalFrame*, bool) override {}
 
   void SetTouchAction(LocalFrame*, TouchAction) override {}
 
   void DidAssociateFormControlsAfterLoad(LocalFrame*) override {}
 
-  void AnnotatedRegionsChanged() override {}
   String AcceptLanguages() override;
 
   CompositorWorkerProxyClient* CreateCompositorWorkerProxyClient(
       LocalFrame*) override {
     return nullptr;
   }
 
   AnimationWorkletProxyClient* CreateAnimationWorkletProxyClient(
       LocalFrame*) override {
     return nullptr;
@@ skipping 142 matching lines @@
   ContentSettingsClient& GetContentSettingsClient() override;
   std::unique_ptr<WebApplicationCacheHost> CreateApplicationCacheHost(
       WebApplicationCacheHostClient*) override;
 
   TextCheckerClient& GetTextCheckerClient() const override;
   std::unique_ptr<WebURLLoader> CreateURLLoader() override {
     // TODO(yhirano): Stop using Platform::CreateURLLoader() here.
     return Platform::Current()->CreateURLLoader();
   }
 
+  void AnnotatedRegionsChanged() override {}
+
  protected:
   EmptyLocalFrameClient() {}
 
   ContentSettingsClient content_settings_client_;
 };
 
 class CORE_EXPORT EmptyTextCheckerClient : public TextCheckerClient {
   WTF_MAKE_NONCOPYABLE(EmptyTextCheckerClient);
   USING_FAST_MALLOC(EmptyTextCheckerClient);
 
@@ skipping 84 matching lines @@
   Frame* NextSibling() const override { return nullptr; }
   Frame* FirstChild() const override { return nullptr; }
   void FrameFocused() const override {}
 };
 
 CORE_EXPORT void FillWithEmptyClients(Page::PageClients&);
 
 }  // namespace blink
 
 #endif  // EmptyClients_h