Add gaia_id to ProfileInfoCache.

chrome/browser/profiles/profile_info_interface.h

Index: chrome/browser/profiles/profile_info_interface.h
diff --git a/chrome/browser/profiles/profile_info_interface.h b/chrome/browser/profiles/profile_info_interface.h
index a314cc9286bb327939182ebd86fe786f2fe0e4db..aa8d11edf9e7f9d320f6d7112a04fd10586d3022 100644
--- a/chrome/browser/profiles/profile_info_interface.h
+++ b/chrome/browser/profiles/profile_info_interface.h
@@ -52,6 +52,8 @@ class ProfileInfoInterface {
   virtual base::string16 GetGAIAGivenNameOfProfileAtIndex(
       size_t index) const = 0;
 
+  virtual std::string GetGAIAIdOfProfileAtIndex(size_t index) const = 0;
+
   virtual const gfx::Image* GetGAIAPictureOfProfileAtIndex(
       size_t index) const = 0;
 
@@ -87,6 +89,9 @@ class ProfileInfoInterface {
   // Returns true if the user has never manually selected a profile avatar.
   virtual bool ProfileIsUsingDefaultAvatarAtIndex(size_t index) const = 0;
 
+  // Returns true if the given profile is connected to an account.
+  virtual bool ProfileIsAuthenticatedAtIndex(size_t index) const = 0;
+
  protected:
   virtual ~ProfileInfoInterface() {}
 };