Add info about user agent overrides to WebContents

chrome/browser/sessions/session_service.h

Index: chrome/browser/sessions/session_service.h
diff --git a/chrome/browser/sessions/session_service.h b/chrome/browser/sessions/session_service.h
index 781fa9cb71cd12fc768e2fb70f0e5b197b9a446e..f2f4cc16abfbe0f97fa54efd3de6cc594aabb6bf 100644
--- a/chrome/browser/sessions/session_service.h
+++ b/chrome/browser/sessions/session_service.h
@@ -54,7 +54,7 @@ class NavigationEntry;
 class SessionService : public BaseSessionService,
                        public content::NotificationObserver {
   friend class SessionRestoreTest;
-  friend class SessionServiceTestHelper;  
+  friend class SessionServiceTestHelper;
  public:
   // Used to distinguish an application window from a normal one.
   enum AppType {
@@ -221,6 +221,11 @@ class SessionService : public BaseSessionService,
                             const SessionID& tab_id,
                             const std::string& extension_app_id);
 
+  // Sets the user agent override of the specified tab.
+  void SetTabUserAgentOverride(const SessionID& window_id,
+                               const SessionID& tab_id,
+                               const std::string& user_agent_override);
+
   // Methods to create the various commands. It is up to the caller to delete
   // the returned the SessionCommand* object.
   SessionCommand* CreateSetSelectedTabInWindow(const SessionID& window_id,