[Contextual Search] Use Mojo API for Quick Answers.

components/contextual_search/browser/contextual_search_ui_handle.h

-// Copyright 2015 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 COMPONENTS_CONTEXTUAL_SEARCH_BROWSER_CONTEXTUAL_SEARCH_UI_HANDLE_H_
-#define COMPONENTS_CONTEXTUAL_SEARCH_BROWSER_CONTEXTUAL_SEARCH_UI_HANDLE_H_
-
-#include <string>
-
-#include "base/macros.h"
-
-namespace contextual_search {
-
-// Interface that the Contextual Search Renderer API uses to call back to
-// the browser.
-class ContextualSearchUIHandle {
- public:
-  ContextualSearchUIHandle() {}
-  virtual ~ContextualSearchUIHandle() {}
-
-  // Set the caption in the Contextual Search Bar, and indicate whether
-  // the caption provides an answer (such as an actual definition), rather than
-  // just general notification of what kind of answer may be available.
-  virtual void SetCaption(std::string caption, bool does_answer) = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ContextualSearchUIHandle);
-};
-
-}  // namespace contextual_search
-
-#endif  // COMPONENTS_CONTEXTUAL_SEARCH_BROWSER_CONTEXTUAL_SEARCH_UI_HANDLE_H_