Welcome page changes for Windows 10 and over.

chrome/browser/browser_process.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.
 
 // This interface is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
 #define CHROME_BROWSER_BROWSER_PROCESS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/browser_process_platform_part.h"
+#include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/host_desktop.h"
 
 class BackgroundModeManager;
 class ChromeNetLog;
 class CRLSetFetcher;
 class DownloadRequestLimiter;
 class DownloadStatusUpdater;
 class GLStringManager;
 class GpuModeManager;
 class IconManager;
@@ skipping 211 matching lines @@
   virtual WebRtcLogUploader* webrtc_log_uploader() = 0;
 #endif
 
   virtual network_time::NetworkTimeTracker* network_time_tracker() = 0;
 
   virtual gcm::GCMDriver* gcm_driver() = 0;
 
   // Returns the out-of-memory priority manager if it exists, null otherwise.
   virtual memory::OomPriorityManager* GetOomPriorityManager() = 0;
 
+  // Returns the default web client state of Chrome (i.e., was it the user's
+  // default browser) at the time a previous check was made sometime between
+  // process startup and now.
+  virtual ShellIntegration::DefaultWebClientState
+  CachedDefaultWebClientState() = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_