Bunch of match preview tweaks:

chrome/browser/search_engines/template_url.h

Index: chrome/browser/search_engines/template_url.h
diff --git a/chrome/browser/search_engines/template_url.h b/chrome/browser/search_engines/template_url.h
index 42eb0bfdfd2dd83f14344d4bb9153f47bfd593aa..ceaa0ecd229f63d3083c0a238877ebb28946dd5a 100644
--- a/chrome/browser/search_engines/template_url.h
+++ b/chrome/browser/search_engines/template_url.h
@@ -277,7 +277,7 @@ class TemplateURL {
   // Generates a favicon URL from the specified url.
   static GURL GenerateFaviconURL(const GURL& url);
 
-  // Returns true if |true| is non-null and has a search URL that supports
+  // Returns true if |turl| is non-null and has a search URL that supports
   // replacement.
   static bool SupportsReplacement(const TemplateURL* turl);
 
@@ -297,6 +297,10 @@ class TemplateURL {
   }
   const std::wstring& short_name() const { return short_name_; }
 
+  // Returns true if this search engine supports showing instant results.
+  // TODO(sky): make this real.
+  bool supports_instant() const { return false; }
+
   // An accessor for the short_name, but adjusted so it can be appropriately
   // displayed even if it is LTR and the UI is RTL.
   std::wstring AdjustedShortNameForLocaleDirection() const;