Remove unused method GetAccessTokenWithTimeout

This method was only used by disabled tests. The need for this function was removed
by modifying those tests https://crrev.com/c/1609900.

Bug: 960281
Change-Id: If44a9681251080c9212faf395872a561382cf04c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1609825
Auto-Submit: Pâris Meuleman <pmeuleman@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Pâris Meuleman <pmeuleman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659408}

components/signin/core/browser/android/java/src/org/chromium/components/signin/OAuth2TokenService.java

@@ -23,11 +23,8 @@ import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.concurrent.Semaphore;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicReference;
 
 /**
  * Java instance for the native OAuth2TokenService.
@@ -256,49 +253,6 @@ public final class OAuth2TokenService
         });
     }
 
-    /**
-     * Call this method to retrieve an OAuth2 access token for the given account and scope. This
-     * method times out after the specified timeout, and will return null if that happens.
-     *
-     * Given that this is a blocking method call, this should never be called from the UI thread.
-     *
-     * @param account the account to get the access token for.
-     * @param scope The scope to get an auth token for (without Android-style 'oauth2:' prefix).
-     * @param timeout the timeout.
-     * @param unit the unit for |timeout|.
-     */
-    @VisibleForTesting
-    public static String getAccessTokenWithTimeout(
-            Account account, String scope, long timeout, TimeUnit unit) {
-        assert !ThreadUtils.runningOnUiThread();
-        final AtomicReference<String> result = new AtomicReference<>();
-        final Semaphore semaphore = new Semaphore(0);
-        getAccessToken(account, scope, new GetAccessTokenCallback() {
-            @Override
-            public void onGetTokenSuccess(String token) {
-                result.set(token);
-                semaphore.release();
-            }
-
-            @Override
-            public void onGetTokenFailure(boolean isTransientError) {
-                result.set(null);
-                semaphore.release();
-            }
-        });
-        try {
-            if (semaphore.tryAcquire(timeout, unit)) {
-                return result.get();
-            } else {
-                Log.d(TAG, "Failed to retrieve auth token within timeout (%s %s)", timeout, unit);
-                return null;
-            }
-        } catch (InterruptedException e) {
-            Log.w(TAG, "Got interrupted while waiting for auth token");
-            return null;
-        }
-    }
-
     /**
      * Called by native to check whether the account has an OAuth2 refresh token.
      */