Make MojoShellActivity ephemeral.

shell/android/apk/src/org/chromium/mojo/shell/ShellService.java

Index: shell/android/apk/src/org/chromium/mojo/shell/ShellService.java
diff --git a/shell/android/apk/src/org/chromium/mojo/shell/ShellService.java b/shell/android/apk/src/org/chromium/mojo/shell/ShellService.java
index b3804c33e5ea1799ba79f4d02c3aab79b23fb656..efb129c7c898f3c9f5a9e15deb4ca8a75d6fa8e4 100644
--- a/shell/android/apk/src/org/chromium/mojo/shell/ShellService.java
+++ b/shell/android/apk/src/org/chromium/mojo/shell/ShellService.java
@@ -11,6 +11,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.content.res.AssetManager;
+import android.net.Uri;
 import android.os.Binder;
 import android.os.IBinder;
 import android.util.JsonReader;
@@ -42,6 +43,9 @@ import java.util.List;
 public class ShellService extends Service {
     private static final String TAG = "ShellService";
 
+    // Name of the intent extra used to hold the application url to start.
+    public static final String APPLICATION_URL_EXTRA = "application_url";
+
     // Directory where applications bundled with the shell will be extracted.
     private static final String LOCAL_APP_DIRECTORY = "local_apps";
     // Individual applications bundled with the shell as assets.
@@ -167,6 +171,12 @@ public class ShellService extends Service {
         // only the first set of parameters will ever be taken into account.
         // TODO(eseidel): ShellService can fail, but we're ignoring the return.
         ensureStarted(getApplicationContext(), getParametersFromIntent(intent));
+        if (intent.hasExtra(APPLICATION_URL_EXTRA)) {
+            // This intent requests we start an application.
+            String urlExtra = intent.getStringExtra(APPLICATION_URL_EXTRA);
+            Uri applicationUri = Uri.parse(urlExtra).buildUpon().scheme("https").build();
+            startApplicationURL(applicationUri.toString());
+        }
         return Service.START_STICKY;
     }