Implement the skeleton of an android content shell.

content/shell/android/java/org/chromium/content_shell/ContentShellActivity.java

Index: content/shell/android/java/org/chromium/content_shell/ContentShellActivity.java
diff --git a/content/shell/android/java/org/chromium/content_shell/ContentShellActivity.java b/content/shell/android/java/org/chromium/content_shell/ContentShellActivity.java
index 4a57e9cfaee4dc1108ef0f53901c62910f4c0c3d..837656130cbf9e2ba9766015066babf7311a446e 100644
--- a/content/shell/android/java/org/chromium/content_shell/ContentShellActivity.java
+++ b/content/shell/android/java/org/chromium/content_shell/ContentShellActivity.java
@@ -5,20 +5,86 @@
 package org.chromium.content_shell;
 
 import android.app.Activity;
+import android.content.Intent;
 import android.os.Bundle;
-import android.util.Log;
+import android.text.TextUtils;
+import android.view.KeyEvent;
+
+import org.chromium.content.browser.ContentView;
 
 /**
- * This is the main activity for content_shell on android, gets invoked when the
- * app is invoked from the launcher. This activity hosts the main UI for content
- * shell and displays the web content via its child views.
+ * Activity for managing the Content Shell.
  */
 public class ContentShellActivity extends Activity {
-    private final String TAG = "ContentShellActivity";
+
+    private static final String COMMAND_LINE_FILE = "/data/local/content-shell-command-line";
+
+    private ShellManager mShellManager;
 
     @Override
-    public void onCreate(Bundle savedInstanceState) {
+    protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        Log.i(TAG, "Content shell started");
+
+        // Initializing the command line must occur before loading the library.
+        // TODO(tedchoc): Initialize command line from file.
+        String startupUrl = getUrlFromIntent(getIntent());
+        if (!TextUtils.isEmpty(startupUrl)) {
+            // TODO(tedchoc): Append URL to command line.
+        }
+
+        // TODO(tedchoc): Load the native library.
+        initializeContentViewResources();
+
+        setContentView(R.layout.content_shell_activity);
+        mShellManager = (ShellManager) findViewById(R.id.shell_container);
+        ContentView.enableMultiProcess(this, ContentView.MAX_RENDERERS_AUTOMATIC);
+    }
+
+    @Override
+    public boolean onKeyUp(int keyCode, KeyEvent event) {
+        if (keyCode != KeyEvent.KEYCODE_BACK) return super.onKeyUp(keyCode, event);
+
+        ShellView activeView = getActiveShellView();
+        if (activeView != null && activeView.getContentView().canGoBack()) {
+            activeView.getContentView().goBack();
+            return true;
+        }
+
+        return super.onKeyUp(keyCode, event);
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        String url = getUrlFromIntent(intent);
+        if (!TextUtils.isEmpty(url)) {
+            ShellView activeView = getActiveShellView();
+            if (activeView != null) {
+                activeView.loadUrl(url);
+            }
+        }
+    }
+
+    private static String getUrlFromIntent(Intent intent) {
+        return intent != null ? intent.getDataString() : null;
+    }
+
+    /**
+     * @return The {@link ShellManager} configured for the activity or null if it has not been
+     *         created yet.
+     */
+    public ShellManager getShellManager() {
+        return mShellManager;
+    }
+
+    /**
+     * @return The currently visible {@link ShellView} or null if one is not showing.
+     */
+    public ShellView getActiveShellView() {
+        return mShellManager != null ? mShellManager.getActiveShellView() : null;
+    }
+
+    private void initializeContentViewResources() {
+        ContentView.registerPopupOverlayCornerRadius(0);
+        ContentView.registerPopupOverlayResourceId(R.drawable.popup_zoomer_overlay);
     }
 }