Add info about user agent overrides to WebContents

chrome/browser/sessions/base_session_service.h

Index: chrome/browser/sessions/base_session_service.h
diff --git a/chrome/browser/sessions/base_session_service.h b/chrome/browser/sessions/base_session_service.h
index 94ce78469492c5d8f4bb3e7fdc3e8aeb1b716865..3a35b77b8c906bcb310b4fb4e565c05513c2e87c 100644
--- a/chrome/browser/sessions/base_session_service.h
+++ b/chrome/browser/sessions/base_session_service.h
@@ -125,6 +125,13 @@ class BaseSessionService : public CancelableRequestProvider,
       SessionID::id_type tab_id,
       const std::string& extension_id);
 
+  // Creates a SessionCommand that containing user agent override used by a
+  // tab's navigations.
+  SessionCommand* CreateSetTabUserAgentOverrideCommand(
+      SessionID::id_type command_id,
+      SessionID::id_type tab_id,
+      const std::string& user_agent_override);
+
   // Creates a SessionCommand stores a browser window's app name.
   SessionCommand* CreateSetWindowAppNameCommand(
       SessionID::id_type command_id,
@@ -147,6 +154,13 @@ class BaseSessionService : public CancelableRequestProvider,
       std::string* extension_app_id);
 
   // Extracts a SessionCommand as previously created by
+  // CreateSetTabUserAgentOverrideCommand into the tab id and user agent.
+  bool RestoreSetTabUserAgentOverrideCommand(
+      const SessionCommand& command,
+      SessionID::id_type* tab_id,
+      std::string* user_agent_override);
+
+  // Extracts a SessionCommand as previously created by
   // CreateSetWindowAppNameCommand into the window id and application name.
   bool RestoreSetWindowAppNameCommand(
       const SessionCommand& command,