[DevTools] Pass remoteBase query param to frontend.

chrome/browser/ui/webui/devtools_ui.h

 // Copyright (c) 2011 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_DEVTOOLS_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_DEVTOOLS_UI_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/devtools/device/devtools_android_bridge.h"
 #include "chrome/browser/devtools/devtools_ui_bindings.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_ui_controller.h"
 
 class Profile;
 
 class DevToolsUI : public content::WebUIController,
                    public content::WebContentsObserver {
  public:
   static GURL GetProxyURL(const std::string& frontend_url);
+  static GURL GetRemoteBaseURL();
 
   explicit DevToolsUI(content::WebUI* web_ui);
   ~DevToolsUI() override;
 
   // content::WebContentsObserver overrides.
   void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) override;
 
  private:
   void RemotePageOpened(const GURL& virtual_url,
                         scoped_refptr<DevToolsAndroidBridge::RemotePage> page);
 
   DevToolsUIBindings bindings_;
   GURL remote_frontend_loading_url_;
   GURL remote_page_opening_url_;
   base::WeakPtrFactory<DevToolsUI> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_DEVTOOLS_UI_H_