Do not use a UIThreadSearchTermsData when validating a TemplateURL for which the Profile is NULL.

chrome/browser/search_engines/template_url_parser.h

Index: chrome/browser/search_engines/template_url_parser.h
diff --git a/chrome/browser/search_engines/template_url_parser.h b/chrome/browser/search_engines/template_url_parser.h
index c7b327b3b05a0e2809b7d3086df92c9bb64283d3..eb76222696f109d4a37906ff8fc8ac84ac5b3df3 100644
--- a/chrome/browser/search_engines/template_url_parser.h
+++ b/chrome/browser/search_engines/template_url_parser.h
@@ -28,13 +28,15 @@ class TemplateURLParser {
   };
 
   // Decodes the chunk of data representing a TemplateURL, creates the
-  // TemplateURL, and returns it.  The caller owns the returned object.  Returns
-  // NULL if data does not describe a valid TemplateURL, the URLs referenced do
-  // not point to valid http/https resources, or for some other reason we do not
-  // support the described TemplateURL.  |parameter_filter| can be used if you
-  // want to filter some parameters out of the URL.  For example, when importing
-  // from another browser, we remove any parameter identifying that browser.  If
-  // set to NULL, the URL is not modified.
+  // TemplateURL, and returns it.  The caller owns the returned object.
+  // |profile| will be used to generate the TemplateUrl returned and should

[Peter Kasting, 2013/04/17 22:50:06]

Nit: The profile isn't used to generate the TURL, so this comment is incorrect. 
Just say:

|profile| should only be non-NULL if this function is called on the UI thread.

[gab, 2013/04/18 15:00:27]

Done.

+  // be NULL if this is called from any thread other than the UI thread.
+  // Returns NULL if data does not describe a valid TemplateURL, the URLs
+  // referenced do not point to valid http/https resources, or for some other
+  // reason we do not support the described TemplateURL.  |parameter_filter| can
+  // be used if you want to filter some parameters out of the URL.  For example,
+  // when importing from another browser, we remove any parameter identifying
+  // that browser.  If set to NULL, the URL is not modified.
   static TemplateURL* Parse(Profile* profile,
                             bool show_in_default_list,
                             const char* data,