Enable content layer to initCommandLine on Android

content/public/android/java/src/org/chromium/content/app/ContentApplication.java

Index: content/public/android/java/src/org/chromium/content/app/ContentApplication.java
diff --git a/content/public/android/java/src/org/chromium/content/app/ContentApplication.java b/content/public/android/java/src/org/chromium/content/app/ContentApplication.java
index b1242246686d1fac05d90103bbc00b8004b7e8a9..acf7e82bb2050d0bbec776de5fe4c210594a9177 100644
--- a/content/public/android/java/src/org/chromium/content/app/ContentApplication.java
+++ b/content/public/android/java/src/org/chromium/content/app/ContentApplication.java
@@ -4,6 +4,7 @@
 
 package org.chromium.content.app;
 
+import android.content.Context;
 import android.os.Looper;
 import android.os.MessageQueue;
 
@@ -15,7 +16,7 @@
  * Basic application functionality that should be shared among all browser applications
  * based on the content layer.
  */
-public class ContentApplication extends BaseChromiumApplication {
+public abstract class ContentApplication extends BaseChromiumApplication {
     private TracingControllerAndroid mTracingController;
 
     TracingControllerAndroid getTracingController() {
@@ -64,4 +65,10 @@ public void onTerminate() {
         super.onTerminate();
     }
 
+    public abstract void initCommandLine();
+
+    /// This must only be called for contexts whose application is a subclass of ContentApplication.
+    public static void initCommandLine(Context context) {
+        ((ContentApplication) context.getApplicationContext()).initCommandLine();
+    };
 }