Remove unused param from search engine extension override helper function.

chrome/browser/extensions/settings_api_helpers.h

 // Copyright (c) 2014 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_SETTINGS_API_HELPERS_H_
 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_API_HELPERS_H_
 
 #include "chrome/common/extensions/manifest_handlers/settings_overrides_handler.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
-struct SettingsOverrides;
+// Returns which extension (if any) is overriding the homepage in a given
+// |browser_context|.
+const Extension* GetExtensionOverridingHomepage(
+    content::BrowserContext* browser_context);
 
-// Find which |extension| is overriding a particular |type| of setting. Returns
-// the SettingsOverride object, or NULL if no |extension| is overriding that
-// particular setting.
-const extensions::SettingsOverrides* FindOverridingExtension(
-    content::BrowserContext* browser_context,
-    SettingsApiOverrideType type,
-    const Extension** extension);
+// Returns which extension (if any) is overriding the homepage in a given
+// |browser_context|.
+const Extension* GetExtensionOverridingStartupPages(
+    content::BrowserContext* browser_context);
 
-// Returns which extension is overriding the homepage in a given
-// |browser_context| or NULL if no extension is overriding the homepage.
-// |home_page_url|, if non-NULL, will contain the home_page value the extension
-// has set.
-const Extension* GetExtensionOverridingHomepage(
-    content::BrowserContext* browser_context,
-    GURL* home_page_url);
+// Returns which extension (if any) is overriding the search engine in a given
+// |browser_context|.
+const Extension* GetExtensionOverridingSearchEngine(
+    content::BrowserContext* browser_context);
 
-// Returns which extension is overriding the homepage in a given
-// |browser_context| or NULL if no extension is overriding the startup pages.
-// |startup_pages|, if non-NULL, will contain the vector of startup page URLs
-// the extension has set.
-const Extension* GetExtensionOverridingStartupPages(
-    content::BrowserContext* browser_context,
-    std::vector<GURL>* startup_pages);
-
-// Returns which extension is overriding the search engine in a given
-// |browser_context| or NULL if no extension is overriding the search engine.
-// |search_provider|, if non-NULL, will contain the search provider the
-// extension has set.
-const Extension* GetExtensionOverridingSearchEngine(
-    content::BrowserContext* browser_context,
-    api::manifest_types::ChromeSettingsOverrides::Search_provider*
-        search_provider);
-
-// Returns which extension is overriding the proxy in a given |browser_context|
-// or NULL if no extension is overriding the proxy.
+// Returns which extension (if any) is overriding the proxy in a given
+// |browser_context|.
 const Extension* GetExtensionOverridingProxy(
     content::BrowserContext* browser_context);
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_API_HELPERS_H_