Remove unused param from search engine extension override helper function.

chrome/browser/extensions/settings_api_helpers.h

Index: chrome/browser/extensions/settings_api_helpers.h
diff --git a/chrome/browser/extensions/settings_api_helpers.h b/chrome/browser/extensions/settings_api_helpers.h
index db2ba36022a0ba95715c036f5336cfac6ef1e035..c8f4c34fb227bba2ca85e347c93ad51045658ef2 100644
--- a/chrome/browser/extensions/settings_api_helpers.h
+++ b/chrome/browser/extensions/settings_api_helpers.h
@@ -36,12 +36,9 @@ const Extension* OverridesStartupPages(content::BrowserContext* browser_context,
                                        std::vector<GURL>* startup_pages);

[Devlin, 2014/06/03 23:16:58]

it looks like these other ones (|home_page_url| in OverridesHomepage() and
|startup_pages| in OverridesStartupPages()) are just as unused... Do you plan to
remove them at later, are they going to be used soon, or should they also be
pulled out in this patch?

 
 // Returns which extension is overriding the search engine in a given
-// |browser_context|. |search_provider|, if non-NULL, will contain the search
-// provider the extension has set.
+// |browser_context|.
 const Extension* OverridesSearchEngine(
-    content::BrowserContext* browser_context,
-    api::manifest_types::ChromeSettingsOverrides::Search_provider*
-        search_provider);
+    content::BrowserContext* browser_context);
 
 }  // namespace extensions