Add ErrorConsole UI for Extension Install Warnings

chrome/browser/resources/extensions/extension_error.css

Index: chrome/browser/resources/extensions/extension_error.css
diff --git a/chrome/browser/resources/extensions/extension_error.css b/chrome/browser/resources/extensions/extension_error.css
new file mode 100644
index 0000000000000000000000000000000000000000..2ec17b13f5f8083bbe5baa654486fa038504c36b
--- /dev/null
+++ b/chrome/browser/resources/extensions/extension_error.css
@@ -0,0 +1,41 @@
+/* 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. */
+
+.extension-error-list a {
+  cursor: pointer;
+}
+
+.extension-error-list-contents {
+  -webkit-padding-start: 20px;
+  list-style-type: none;
+}
+
+.extension-error-list-show-more {
+  cursor: pointer;
+  text-align: center;
+  width: 100%;
+}
+
+.extension-error-simple-wrapper {
+  display: -webkit-box;
+  width: 100%;
+}
+
+.extension-error-simple-wrapper >:first-child {

[Dan Beam, 2013/08/20 21:39:26]

nit: .extension-error-simple-wrapper > :first-child {

[Devlin, 2013/08/20 23:06:51]

Done.

+  width: 85%;
+}
+
+.extension-error-icon-error,
+.extension-error-icon-log,
+.extension-error-icon-warn {
+  -webkit-margin-end: 3px;
+  -webkit-margin-start: 3px;
+  height: 15px;
+  vertical-align: middle;
+  width: 15px;
+}
+
+.extension-error-message {
+  color: rgba(200, 50, 50, 255);
+}