Notify Java O2TS when revoking all tokens.

During a forced signout (sync account removed from device), we signout without ever
give the token service a chance to validate accounts. Without this CL, the AO2TS
becomes out-of-sync with the device's account list.

BUG=393037

Review URL: https://codereview.chromium.org/401693003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284218 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/signin/android_profile_oauth2_token_service.cc

@@ -371,6 +371,14 @@ void AndroidProfileOAuth2TokenService::RevokeAllCredentials() {
        it != accounts.end(); it++) {
     FireRefreshTokenRevoked(*it);
   }
+
+  // Clear everything on the Java side as well.
+  std::vector<std::string> empty;
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobjectArray> java_accounts(
+      base::android::ToJavaArrayOfStrings(env, empty));
+  Java_OAuth2TokenService_saveStoredAccounts(
+      env, base::android::GetApplicationContext(), java_accounts.obj());
 }
 
 // Called from Java when fetching of an OAuth2 token is finished. The