Make the ChromeBrowserInitializer the only way to start the browser process.

chrome/android/java/src/org/chromium/chrome/browser/init/EmptyBrowserParts.java

Index: chrome/android/java/src/org/chromium/chrome/browser/init/EmptyBrowserParts.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/init/EmptyBrowserParts.java b/chrome/android/java/src/org/chromium/chrome/browser/init/EmptyBrowserParts.java
new file mode 100644
index 0000000000000000000000000000000000000000..095c22119f2205b7f293c26f80cf5c2f56b55b7d
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/init/EmptyBrowserParts.java
@@ -0,0 +1,49 @@
+// 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.init;
+
+/**
+ * Empty implementation of the browser parts for easy extension.
+ */
+public class EmptyBrowserParts implements BrowserParts {
+
+    @Override
+    public void preInflationStartup() {
+    }
+
+    @Override
+    public void setContentViewAndLoadLibrary() {
+    }
+
+    @Override
+    public void postInflationStartup() {
+    }
+
+    @Override
+    public void maybePreconnect() {
+    }
+
+    @Override
+    public void initializeCompositor() {
+    }
+
+    @Override
+    public void initializeState() {
+    }
+
+    @Override
+    public void finishNativeInitialization() {
+    }
+
+    @Override
+    public void onStartupFailure() {
+    }
+
+    @Override
+    public boolean isActivityDestroyed() {
+        return false;
+    }
+
+}