Cache GAIA profile picture URL

chrome/browser/chromeos/login/user_manager.cc

Index: chrome/browser/chromeos/login/user_manager.cc
diff --git a/chrome/browser/chromeos/login/user_manager.cc b/chrome/browser/chromeos/login/user_manager.cc
index ec0f893e8a4526c85de6aa452bf196c023ca425e..b5785f61bd49f88f405ff2433221b5120a8f04e1 100644
--- a/chrome/browser/chromeos/login/user_manager.cc
+++ b/chrome/browser/chromeos/login/user_manager.cc
@@ -832,7 +832,7 @@ void UserManager::CheckOwnership() {
                  is_owner));
 }
 
-int UserManager::GetDesiredImageSideLength() {
+int UserManager::GetDesiredImageSideLength() const {
   return login::kUserImageSize;
 }
 
@@ -840,10 +840,15 @@ Profile* UserManager::GetBrowserProfile() {
   return ProfileManager::GetDefaultProfile();
 }
 
-bool UserManager::ShouldUseOAuthRefreshToken() {
+bool UserManager::ShouldUseOAuthRefreshToken() const {
   return false;
 }
 
+std::string UserManager::GetCachedPictureURL() const {
+  // Currently the profile picture URL is not cached on ChromeOS.
+  return std::string();
+}
+
 void UserManager::OnDownloadComplete(ProfileDownloader* downloader,
                                      bool success) {
   ProfileDownloadResult result;