Create a WebUIController for chrome://suggestions

chrome/browser/search/suggestions/suggestions_source.h

-// 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.
-
-#ifndef CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_SOURCE_H_
-#define CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_SOURCE_H_
-
-#include <map>
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "components/suggestions/proto/suggestions.pb.h"
-#include "content/public/browser/url_data_source.h"
-#include "url/gurl.h"
-
-class Profile;
-class SkBitmap;
-
-namespace suggestions {
-
-// SuggestionsSource renders a webpage to list SuggestionsService data.
-class SuggestionsSource : public content::URLDataSource {
- public:
-  explicit SuggestionsSource(Profile* profile);
-
-  // content::URLDataSource implementation.
-  std::string GetSource() const override;
-  void StartDataRequest(
-      const std::string& path,
-      int render_process_id,
-      int render_frame_id,
-      const content::URLDataSource::GotDataCallback& callback) override;
-  std::string GetMimeType(const std::string& path) const override;
-  base::MessageLoop* MessageLoopForRequestPath(
-      const std::string& path) const override;
-
- private:
-  ~SuggestionsSource() override;
-
-  // Container for the state of a request.
-  struct RequestContext {
-    RequestContext(
-        bool is_refresh_in,
-        const suggestions::SuggestionsProfile& suggestions_profile_in,
-        const content::URLDataSource::GotDataCallback& callback_in);
-    ~RequestContext();
-
-    const bool is_refresh;
-    const suggestions::SuggestionsProfile suggestions_profile;
-    const content::URLDataSource::GotDataCallback callback;
-    std::map<GURL, std::string> base64_encoded_pngs;
-  };
-
-  // Callback for responses from each Thumbnail request.
-  void OnThumbnailAvailable(RequestContext* context, base::Closure barrier,
-                            const GURL& url, const SkBitmap* bitmap);
-
-  // Callback for when all requests are complete. Renders the output webpage and
-  // passes the result to the original caller.
-  void OnThumbnailsFetched(RequestContext* context);
-
-  // Only used when servicing requests on the UI thread.
-  Profile* const profile_;
-
-  // For callbacks may be run after destruction.
-  base::WeakPtrFactory<SuggestionsSource> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SuggestionsSource);
-};
-
-}  // namespace suggestions
-
-#endif  // CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_SOURCE_H_