Mojo-ifying chrome://version.

chrome/browser/ui/webui/version_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_H_
 
 #include <vector>
 

[Eugene But (OOO till 7-30), 2016/06/04 01:15:25]

This file can be shared with iOS. Not much (only inheritance from
mojom::VersionPageHandler and GetVariations implementation) but still. Should we
componetize this file and mojo_web_ui_handler.h?

[Eugene But (OOO till 7-30), 2016/06/06 17:20:53]

Sorry, I was wrong. This file uses content// which can not be used on iOS. Since
sharing the code will not be trivial, please ignore my comment.

 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
-#include "content/public/browser/web_ui_message_handler.h"
+#include "chrome/browser/ui/webui/mojo_web_ui_handler.h"
+#include "chrome/browser/ui/webui/version.mojom.h"
+#include "content/public/browser/web_ui.h"
 #include "content/public/common/webplugininfo.h"
+#include "mojo/public/cpp/bindings/binding.h"
 
 // Handler class for Version page operations.
-class VersionHandler : public content::WebUIMessageHandler {
+class VersionHandler : public MojoWebUIHandler,
+                       public mojom::VersionPageHandler {
  public:
-  VersionHandler();
+  VersionHandler(content::WebUI* web_ui,
+                 mojo::InterfaceRequest<VersionPageHandler> request);
   ~VersionHandler() override;
 
-  // content::WebUIMessageHandler implementation.
-  void RegisterMessages() override;
-
-  // Callback for the "requestVersionInfo" message. This asynchronously requests
-  // the flash version and eventually returns it to the front end along with the
-  // list of variations using OnGotPlugins.
-  virtual void HandleRequestVersionInfo(const base::ListValue* args);
+  // mojom::VersionPageHandler overrides:
+  void GetFilePaths(const GetFilePathsCallback& callback) override;
+  void GetFlashVersion(const GetFlashVersionCallback& callback) override;
+  void GetVariations(const GetVariationsCallback& callback) override;
+  void GetOsVersion(const GetOsVersionCallback& callback) override;
+  void GetArcVersion(const GetArcVersionCallback& callback) override;
 
  private:
   // Callback which handles returning the executable and profile paths to the
   // front end.
   void OnGotFilePaths(base::string16* executable_path_data,
-                      base::string16* profile_path_data);
+                      base::string16* profile_path_data,
+                      const GetFilePathsCallback& callback);
 
+#if defined(ENABLE_PLUGINS)
   // Callback for GetPlugins which responds to the page with the Flash version.
-  // This also initiates the OS Version load on ChromeOS.
-  void OnGotPlugins(const std::vector<content::WebPluginInfo>& plugins);
+  void OnGotPlugins(const GetFlashVersionCallback& callback,
+                    const std::vector<content::WebPluginInfo>& plugins);
+#endif  // defined(ENABLE_PLUGINS)
+#if defined(OS_CHROMEOS)
+  void OnGotOsVersion(const GetOsVersionCallback& callback,
+                      const std::string& version);
+  void OnGotArcVersion(const GetOsVersionCallback& callback,
+                       const std::string& version);
+#endif  // defined(OS_CHROMEOS)
+
+  content::WebUI* web_ui_;
+  mojo::Binding<mojom::VersionPageHandler> binding_;
 
   // Factory for the creating refs in callbacks.
   base::WeakPtrFactory<VersionHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VersionHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_H_