Merge 135316 - When calling DocumentStyleSheetCollection::addUserSheet, pass in a user sheet

Source/WebCore/ChangeLog

Index: Source/WebCore/ChangeLog
===================================================================
--- Source/WebCore/ChangeLog	(revision 135773)
+++ Source/WebCore/ChangeLog	(working copy)
@@ -1,3 +1,21 @@
+2012-11-20  Tony Chang  <tony@chromium.org>
+
+        When calling DocumentStyleSheetCollection::addUserSheet, pass in a user sheet
+        https://bugs.webkit.org/show_bug.cgi?id=102835
+
+        Reviewed by Ojan Vafai.
+
+        After r135082, Chromium browser_tests were triggering the ASSERT in
+        StyleResolver::collectRulesFromUserStyleSheets. Add an ASSERT that will
+        trigger earlier and make it clear in the Chromium code that we're always
+        inserting user level styles.
+
+        No new tests, no behavior change except no longer triggering the StyleResolver ASSERT
+        in Chromium browser_tests.
+
+        * dom/DocumentStyleSheetCollection.cpp:
+        (WebCore::DocumentStyleSheetCollection::addUserSheet):
+
 2012-11-18  Antti Koivisto  <antti@apple.com>
 
         REGRESSION(r129644): User StyleSheet not applying