Set extension-related webkit preferences in a common location.

chrome/browser/tab_contents/background_contents.cc

Index: chrome/browser/tab_contents/background_contents.cc
diff --git a/chrome/browser/tab_contents/background_contents.cc b/chrome/browser/tab_contents/background_contents.cc
index 6b3187a49ec5767995d1ec2fe2cce2c25981b319..33af53fc0b5d8f7f7756f8a36e54425e8e548dbd 100644
--- a/chrome/browser/tab_contents/background_contents.cc
+++ b/chrome/browser/tab_contents/background_contents.cc
@@ -185,12 +185,9 @@ RendererPreferences BackgroundContents::GetRendererPrefs(
 }
 
 WebPreferences BackgroundContents::GetWebkitPrefs() {
-  // TODO(rafaelw): Consider enabling the webkit_prefs.dom_paste_enabled for
-  // apps.
-  Profile* profile = Profile::FromBrowserContext(
-      render_view_host_->process()->browser_context());
-  WebPreferences prefs = RenderViewHostDelegateHelper::GetWebkitPrefs(profile,
-                                                                      false);
+  WebPreferences prefs =
+      RenderViewHostDelegateHelper::GetWebkitPrefs(render_view_host_);
+
   // Disable all kinds of acceleration for background pages.
   // See http://crbug.com/96005 and http://crbug.com/96006
   prefs.force_compositing_mode = false;