Refactor AO2TS to make it easier to componentize.

chrome/browser/signin/fake_profile_oauth2_token_service.cc

Index: chrome/browser/signin/fake_profile_oauth2_token_service.cc
diff --git a/chrome/browser/signin/fake_profile_oauth2_token_service.cc b/chrome/browser/signin/fake_profile_oauth2_token_service.cc
index 6901cdf4d890b840551abeee04f0f9545a0b46a0..16e7a2d48d358479fdd30dc6b5cc80850acd6954 100644
--- a/chrome/browser/signin/fake_profile_oauth2_token_service.cc
+++ b/chrome/browser/signin/fake_profile_oauth2_token_service.cc
@@ -14,7 +14,8 @@ FakeProfileOAuth2TokenService::PendingRequest::~PendingRequest() {
 }
 
 FakeProfileOAuth2TokenService::FakeProfileOAuth2TokenService()
-    : auto_post_fetch_response_on_message_loop_(false),
+    : ProfileOAuth2TokenService(NULL),
+      auto_post_fetch_response_on_message_loop_(false),
       weak_ptr_factory_(this) {
 }
 
@@ -55,19 +56,19 @@ void FakeProfileOAuth2TokenService::IssueRefreshToken(
 void FakeProfileOAuth2TokenService::IssueRefreshTokenForUser(
     const std::string& account_id,
     const std::string& token) {
-  ScopedBatchChange batch(this);
+  // ScopedBatchChange batch(this);
   if (token.empty()) {
     refresh_tokens_.erase(account_id);
-    FireRefreshTokenRevoked(account_id);
+    // FireRefreshTokenRevoked(account_id);
   } else {
     refresh_tokens_[account_id] = token;
-    FireRefreshTokenAvailable(account_id);
+    // FireRefreshTokenAvailable(account_id);
     // TODO(atwilson): Maybe we should also call FireRefreshTokensLoaded() here?
   }
 }
 
 void FakeProfileOAuth2TokenService::IssueAllRefreshTokensLoaded() {
-  FireRefreshTokensLoaded();
+  // FireRefreshTokensLoaded();

[Roger Tawa OOO till Jul 10th, 2015/05/24 21:13:18]

Probably don't need this class anymore, once we have a fake O2TS delegate.

[gogerald1, 2015/05/25 21:10:57]

Probably, need more investigation after we lock down the interface and
implementation of the OAuth2TokenService (like FetchOAuth2Token).

 }
 
 void FakeProfileOAuth2TokenService::IssueAllTokensForAccount(