Implement screen capture for android

media/base/android/java/src/org/chromium/media/ScreenCaptureFactory.java

+// 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.media;
+
+import android.content.Context;
+import android.os.Build;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+@JNINamespace("media")
+@SuppressWarnings("deprecation")
+class ScreenCaptureFactory {
+
+    private static final String TAG = "ScreenCaptureAndroid";
+
+    private static boolean isLReleaseOrLater() {
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;

[miu, 2015/05/20 03:33:27]

nit: This expression doesn't need its own method.

+    }
+
+    // Factory methods.
+    @CalledByNative
+    static ScreenCapture createScreenCapture(Context context, long nativeScreenCapturerAndroid) {
+        if (isLReleaseOrLater()) {
+            return new ScreenCapture(context, nativeScreenCapturerAndroid);
+        }
+        return null;
+    }
+}