Revert of Cache the current WebPreferences on RenderViewHostImpl.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index f03fe5d1c0374ab4c7b1866497954acd73f1152b..5c9cd720bd74ca281485fdac701c09db6cf00c95 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -3834,7 +3834,7 @@
                                         source_id);
 }
 
-WebPreferences WebContentsImpl::ComputeWebkitPrefs() {
+WebPreferences WebContentsImpl::GetWebkitPrefs() {
   // We want to base the page config off of the actual URL, rather than the
   // virtual URL.
   // TODO(nasko): Investigate how to remove the GetActiveEntry usage here,
@@ -3842,7 +3842,7 @@
   GURL url = controller_.GetActiveEntry()
       ? controller_.GetActiveEntry()->GetURL() : GURL::EmptyGURL();
 
-  return GetRenderManager()->current_host()->ComputeWebkitPrefs(url);
+  return GetRenderManager()->current_host()->GetWebkitPrefs(url);
 }
 
 int WebContentsImpl::CreateSwappedOutRenderView(