Get mojo_shell building inside chromium checkout.

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

+// Copyright 2013 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.mojo.shell;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.JsonReader;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Activity for managing the Mojo Shell.
+ */
+public class MojoShellActivity extends Activity {
+    private static final String TAG = "MojoShellActivity";
+
+    @Override
+    protected void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // TODO(ppi): Gotcha - the call below will work only once per process lifetime, but the OS
+        // has no obligation to kill the application process between destroying and restarting the
+        // activity. If the application process is kept alive, initialization parameters sent with
+        // the intent will be stale.
+        // TODO(qsr): We should be passing application context here as required by
+        // InitApplicationContext on the native side. Currently we can't, as PlatformViewportAndroid
+        // relies on this being the activity context.
+        ShellMain.ensureInitialized(this, getParametersFromIntent(getIntent()));
+
+        // TODO(eseidel): ShellMain can fail, but we're ignoring the return.
+        ShellMain.start();
+    }
+
+    private static String[] getParametersFromIntent(Intent intent) {
+        if (intent == null) {
+            return null;
+        }
+        String[] parameters = intent.getStringArrayExtra("parameters");
+        if (parameters != null) {
+            return parameters;
+        }
+        String encodedParameters = intent.getStringExtra("encodedParameters");
+        if (encodedParameters != null) {
+            JsonReader reader = new JsonReader(new StringReader(encodedParameters));
+            List<String> parametersList = new ArrayList<String>();
+            try {
+                reader.beginArray();
+                while (reader.hasNext()) {
+                    parametersList.add(reader.nextString());
+                }
+                reader.endArray();
+                reader.close();
+                return parametersList.toArray(new String[parametersList.size()]);
+            } catch (IOException e) {
+                Log.w(TAG, e.getMessage(), e);
+            }
+        }
+        return null;
+    }
+}