Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/gcore/ChromeGoogleApiClient.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/gcore/ChromeGoogleApiClient.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/gcore/ChromeGoogleApiClient.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/gcore/ChromeGoogleApiClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..9eefffd368d3d7ef0153ad0671fe0d6dec4b8cdc
--- /dev/null
+++ b/chrome/android/java_staging/src/org/chromium/chrome/browser/gcore/ChromeGoogleApiClient.java
@@ -0,0 +1,31 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.gcore;
+
+/**
+ * Client used to communicate with GmsCore using Google API. Meant to be
+ * used in a synchronous way with {@link ConnectedTask}.
+ */
+public interface ChromeGoogleApiClient {
+    /**
+     * Connects the GMS Core client.
+     * Does nothing if the client is already connected.
+     * @param timeoutMillis after which connection is considered unsuccessful
+     * @return whether connection was successful
+     */
+    boolean connectWithTimeout(long timeoutMillis);
+
+    /**
+     * Disconnects client.
+     * Can be safely called on disconnected clients. It will then just clear the queued calls
+     * submitted since the last disconnection.
+     */
+    void disconnect();
+
+    /**
+     * Checks if Google Play Services are available.
+     */
+    boolean isGooglePlayServicesAvailable();
+}