Refactor AO2TS to make it easier to componentize.

sync/internal_api/attachments/attachment_uploader_impl_unittest.cc

Index: sync/internal_api/attachments/attachment_uploader_impl_unittest.cc
diff --git a/sync/internal_api/attachments/attachment_uploader_impl_unittest.cc b/sync/internal_api/attachments/attachment_uploader_impl_unittest.cc
index 882b575834af22e42cdf396cc4d3372fc71aebce..ce545bec6222019278a0e225f869fc03665f569f 100644
--- a/sync/internal_api/attachments/attachment_uploader_impl_unittest.cc
+++ b/sync/internal_api/attachments/attachment_uploader_impl_unittest.cc
@@ -90,10 +90,10 @@ class MockOAuth2TokenService : public FakeOAuth2TokenService {
                         const std::string& client_secret,
                         const ScopeSet& scopes) override;
 
-  void InvalidateOAuth2Token(const std::string& account_id,
-                             const std::string& client_id,
-                             const ScopeSet& scopes,
-                             const std::string& access_token) override;
+  void InvalidateAccessTokenImpl(const std::string& account_id,
+                                 const std::string& client_id,
+                                 const ScopeSet& scopes,
+                                 const std::string& access_token) override;
 
  private:
   GoogleServiceAuthError response_error_;
@@ -137,7 +137,7 @@ void MockOAuth2TokenService::FetchOAuth2Token(
                  response_expiration_));
 }
 
-void MockOAuth2TokenService::InvalidateOAuth2Token(
+void MockOAuth2TokenService::InvalidateAccessTokenImpl(
     const std::string& account_id,
     const std::string& client_id,
     const ScopeSet& scopes,