Adds initial JNI bridge code for Background Scheduler implementation.

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..dc6e0cec2407258540701b569cf892add8ac4a75
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
@@ -0,0 +1,52 @@
+// Copyright 2016 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.offlinepages;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.chrome.browser.profiles.Profile;
+
+/**
+ * Provides Java scheduling support from native offlining code as
+ * well as JNI interface to tell native code to start processing
+ * queued requests.
+ */
+@JNINamespace("offline_pages::android")
+public class BackgroundSchedulerBridge {
+
+    /**
+     * Callback used to determine when request processing is done.
+     */
+    public interface ProcessingDoneCallback {
+        @CalledByNative("ProcessingDoneCallback")
+        void onProcessingDone(boolean result);
+    }
+
+    // Starts processing of one or more queued background requests.
+    // Returns whether processing was started and that caller should
+    // expect a callback (once processing has completed or terminated).i

[fgorski, 2016/04/29 04:50:41]

there might be a typo at the end.

[dougarnett, 2016/04/29 15:59:07]

Done.

+    // If processing was already active, returns false and this calling

[fgorski, 2016/04/29 04:50:41]

would that be the only reason to not start the processing?

[dougarnett, 2016/04/29 15:59:07]

Opened up to any undefined reason not accepted and added TODO about
adding the policy check api call.

+    // instance will not receive a callback.
+    public static boolean startProcessing(
+            Profile profile, ProcessingDoneCallback callback) {
+        return nativeStartProcessing(profile, callback);
+    }
+
+    @CalledByNative
+    private static void schedule() {
+        // TODO(dougarnett): call GcmNetworkManager to schedule for
+        //     OfflinePageUtils.TASK_TAG.
+    }
+
+    @CalledByNative
+    private static void unschedule() {
+        // TODO(dougarnett): call GcmNetworkManager to unschedule for
+        //     OfflinePageUtils.TASK_TAG.
+    }
+
+    private static native boolean nativeStartProcessing(
+            Profile profile, ProcessingDoneCallback callback);
+}
+