Create copy of extensions page that is standalone.

The js/html/css is copied and modified. The WebUIHandler is re-used, as I don't expect to have to make any modifications to it. There is a good deal of css that I did not copy (things from options_page.css), which makes it visually a little strange, but otherwise most things work.

TODO: pack extension overlay, css, developer mode toggle

BUG=107323
TEST=chrome://extensions-frame or chrome://chrome

Review URL: http://codereview.chromium.org/8898017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114313 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/resources/extensions/pack_extension_overlay.css b/chrome/browser/resources/extensions/pack_extension_overlay.css
new file mode 100644
index 0000000..169750b
--- /dev/null
+++ b/chrome/browser/resources/extensions/pack_extension_overlay.css
@@ -0,0 +1,18 @@
+/*
+Copyright (c) 2011 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.
+*/
+
+.packExtensionHeading {
+  width: 520px;
+  padding-bottom: 5px;
+}
+
+.packExtensionTextBoxes {
+  text-align: right;
+}
+
+.packExtensionTextArea {
+  width: 260px;
+}