Refactor OAuth2TokenService to have profile- and device-based implementations.

chrome/browser/browser_process.h

Index: chrome/browser/browser_process.h
diff --git a/chrome/browser/browser_process.h b/chrome/browser/browser_process.h
index c8286bc81fb3a039139f6c513b23c6e371863aa7..2c7fcca7643a858ded8f97b08e06318f03b69624 100644
--- a/chrome/browser/browser_process.h
+++ b/chrome/browser/browser_process.h
@@ -46,6 +46,7 @@ class MediaFileSystemRegistry;
 
 #if defined(OS_CHROMEOS)
 namespace chromeos {
+class DeviceOAuth2TokenService;
 class OomPriorityManager;
 }
 #endif  // defined(OS_CHROMEOS)
@@ -113,6 +114,11 @@ class BrowserProcess {
 #if defined(OS_CHROMEOS)
   // Returns the out-of-memory priority manager.
   virtual chromeos::OomPriorityManager* oom_priority_manager() = 0;
+
+  // Returns the OAuth2TokenService instance for the device-level robot account
+  // (available on enterprise-enrolled devices).  Returns NULL if the IO thread
+  // is not available.
+  virtual chromeos::DeviceOAuth2TokenService* device_oauth2_token_service() = 0;
 #endif  // defined(OS_CHROMEOS)
 
   virtual extensions::EventRouterForwarder*