Set extension-related webkit preferences in a common location.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index d1651a8426be543a8e3e3ac0e63640e52df161ff..a9a68fca527bc59d9112c8aef3568da6fb977690 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -889,10 +889,8 @@ bool ChromeContentBrowserClient::IsFastShutdownPossible() {
   return !browser_command_line.HasSwitch(switches::kChromeFrame);
 }
 
-WebPreferences ChromeContentBrowserClient::GetWebkitPrefs(
-    content::BrowserContext* browser_context, bool is_web_ui) {
-  return RenderViewHostDelegateHelper::GetWebkitPrefs(browser_context,
-                                                      is_web_ui);
+WebPreferences ChromeContentBrowserClient::GetWebkitPrefs(RenderViewHost* rvh) {
+  return RenderViewHostDelegateHelper::GetWebkitPrefs(rvh);
 }
 
 void ChromeContentBrowserClient::UpdateInspectorSetting(