Move SearchProvider implementation into Blink and make it a no-op.

third_party/WebKit/Source/core/frame/DOMWindow.cpp

 // 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.
 
 #include "core/frame/DOMWindow.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/SecurityContext.h"
 #include "core/events/MessageEvent.h"
+#include "core/frame/External.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameClient.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/Location.h"
 #include "core/frame/RemoteDOMWindow.h"
 #include "core/frame/RemoteFrame.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/input/EventHandler.h"
@@ skipping 95 matching lines @@
 {
     // TODO(yukishiino): The 'top' attribute must return |this|
     // (the WindowProxy object of the browsing context itself) when it's
     // top-level or detached.
     if (!isCurrentlyDisplayedInFrame())
         return nullptr;
 
     return frame()->tree().top()->domWindow();
 }
 
+External* DOMWindow::external() const
+{
+    DEFINE_STATIC_LOCAL(Persistent<External>, external, (new External));
+    return external;
+}
+
 DOMWindow* DOMWindow::anonymousIndexedGetter(uint32_t index) const
 {
     if (!frame())
         return nullptr;
 
     Frame* child = frame()->tree().scopedChild(index);
     return child ? child->domWindow() : nullptr;
 }
 
 bool DOMWindow::isCurrentlyDisplayedInFrame() const
@@ skipping 237 matching lines @@
     page->focusController().focusDocumentView(frame(), true /* notifyEmbedder */);
 }
 
 DEFINE_TRACE(DOMWindow)
 {
     visitor->trace(m_location);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink