Allow content script insertion on about:-URLs.

chrome/common/extensions/docs/templates/articles/match_patterns.html

Index: chrome/common/extensions/docs/templates/articles/match_patterns.html
diff --git a/chrome/common/extensions/docs/templates/articles/match_patterns.html b/chrome/common/extensions/docs/templates/articles/match_patterns.html
index 1abf3d5ff560d2db041ad4a63ba6bdb547c09134..f75cfa7f8f3b36dff3c93c262bb0697a3a8ea4a7 100644
--- a/chrome/common/extensions/docs/templates/articles/match_patterns.html
+++ b/chrome/common/extensions/docs/templates/articles/match_patterns.html
@@ -45,7 +45,7 @@ Each match pattern has 3 parts:</p>
 
 <pre>
 <em>&lt;url-pattern&gt;</em> := <em>&lt;scheme&gt;</em>://<em>&lt;host&gt;</em><em>&lt;path&gt;</em>
-<em>&lt;scheme&gt;</em> := '*' | 'http' | 'https' | 'file' | 'ftp' | 'chrome-extension'
+<em>&lt;scheme&gt;</em> := '*' | 'http' | 'https' | 'file' | 'ftp' | 'chrome-extension' | 'about'
 <em>&lt;host&gt;</em> := '*' | '*.' <em>&lt;any char except '/' and '*'&gt;</em>+
 <em>&lt;path&gt;</em> := '/' <em>&lt;any chars&gt;</em>
 </pre>
@@ -182,6 +182,24 @@ The following table shows some valid patterns.
 
 <tr>
   <td>
+    <code>about:* </code>
+  </td>
+
+  <td>
+    Matches any URL that uses the <code>about</code> scheme.
+    Content scripts matching this pattern are only inserted if the page was
+    loaded by a page whose URL matches at least one of the other declared
+    patterns.

[not at google - send to devlin, 2014/04/18 16:04:55]

what about top-level about: frames?

+  </td>
+
+  <td>
+    about:blank<br>
+    about:srcdoc
+  </td>
+</tr>
+
+<tr>
+  <td>
     <code>chrome-extension://*/* </code>
   </td>