Mus experiment in content shell on Android.

content/shell/android/java/src/org/chromium/content_shell/Shell.java

Index: content/shell/android/java/src/org/chromium/content_shell/Shell.java
diff --git a/content/shell/android/java/src/org/chromium/content_shell/Shell.java b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
index 7cc7a7261b451bc2eb7201aa8705fc9cad7be227..73c95627ca19af438f6f6cadb615a791915f5ba5 100644
--- a/content/shell/android/java/src/org/chromium/content_shell/Shell.java
+++ b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
@@ -20,6 +20,7 @@ import android.widget.ImageButton;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.TextView.OnEditorActionListener;
+import android.widget.Toast;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
@@ -58,6 +59,7 @@ public class Shell extends LinearLayout {
     private ImageButton mPrevButton;
     private ImageButton mNextButton;
     private ImageButton mStopReloadButton;
+    private ImageButton mMusButton;
 
     private ClipDrawable mProgressDrawable;
 
@@ -242,6 +244,17 @@ public class Shell extends LinearLayout {
                 else mNavigationController.reload(true);
             }
         });
+        if (nativeShowMusDemoButton()) {
+            mMusButton = (ImageButton) findViewById(R.id.show_mus);
+            mMusButton.setVisibility(View.VISIBLE);
+            mMusButton.setOnClickListener(new OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    Toast.makeText(getContext(), "Showing Mus demo", Toast.LENGTH_SHORT).show();
+                    nativeStartMusDemo(mNativeShell);
+                }
+            });
+        }
     }
 
     @SuppressWarnings("unused")
@@ -373,4 +386,6 @@ public class Shell extends LinearLayout {
     }
 
     private static native void nativeCloseShell(long shellPtr);
+    private static native boolean nativeShowMusDemoButton();
+    private native void nativeStartMusDemo(long nativeShell);
 }