Create ContentShellActivityTestRule and BaseJUnitRunner

content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java

 // Copyright 2012 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.content_shell_apk;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.text.TextUtils;
-import android.util.Log;
 import android.view.KeyEvent;
 import android.widget.Toast;
 
 import org.chromium.base.BaseSwitches;
 import org.chromium.base.CommandLine;
+import org.chromium.base.Log;
 import org.chromium.base.MemoryPressureListener;
 import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.library_loader.LibraryProcessType;
 import org.chromium.base.library_loader.ProcessInitException;
 import org.chromium.content.app.ContentApplication;
 import org.chromium.content.browser.BrowserStartupController;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.DeviceUtils;
 import org.chromium.content.common.ContentSwitches;
@@ skipping 229 matching lines @@
     /**
      * @return The {@link WebContents} owned by the currently visible {@link Shell} or null if
      *         one is not showing.
      */
     public WebContents getActiveWebContents() {
         Shell shell = getActiveShell();
         return shell != null ? shell.getWebContents() : null;
     }
 
 }