[Android] Add gyp support for multidex.

base/android/java/src/org/chromium/base/multidex/ChromiumMultiDex.java

Index: base/android/java/src/org/chromium/base/multidex/ChromiumMultiDex.java
diff --git a/base/android/java/src/org/chromium/base/multidex/ChromiumMultiDex.java b/base/android/java/src/org/chromium/base/multidex/ChromiumMultiDex.java
new file mode 100644
index 0000000000000000000000000000000000000000..6ed93698a27e6b463e00d0657b6e9ed9cdd31b05
--- /dev/null
+++ b/base/android/java/src/org/chromium/base/multidex/ChromiumMultiDex.java
@@ -0,0 +1,56 @@
+// 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.base.multidex;
+
+import android.content.Context;
+import android.os.Build;
+import android.os.Process;
+import android.support.multidex.MultiDex;
+
+import org.chromium.base.Log;
+
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ *  Performs multidex installation for non-isolated processes.
+ */
+public class ChromiumMultiDex {
+
+    private static final String TAG = "cr.base.multidex";
+
+    /**
+     *  Installs secondary dexes if possible.
+     *
+     *  Isolated processes (e.g. renderer processes) can't load secondary dex files on
+     *  K and below, so we don't even try in that case.
+     *
+     *  @param context The application context.
+     */
+    public static void install(Context context) {
+        try {
+            // TODO(jbudorick): Back out this version check once support for K & below works.
+            // http://crbug.com/512357
+            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP && processIsIsolated()) {
+                Log.i(TAG, "Skipping multidex installation: inside isolated process.");
+            } else {
+                MultiDex.install(context);
+                Log.i(TAG, "Completed multidex installation.");
+            }
+        } catch (NoSuchMethodException e) {
+            Log.wtf(TAG, "Failed multidex installation", e);
+        } catch (IllegalAccessException e) {
+            Log.wtf(TAG, "Failed multidex installation", e);
+        } catch (InvocationTargetException e) {
+            Log.wtf(TAG, "Failed multidex installation", e);
+        }
+    }
+
+    // Calls Process.isIsolated, a private Android API.
+    private static boolean processIsIsolated()
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return (boolean) Process.class.getMethod("isIsolated").invoke(null);
+    }
+
+}