Merge 135082 - REGRESSION(r129644): User StyleSheet not applying

Source/WebCore/dom/Document.cpp

Index: Source/WebCore/dom/Document.cpp
===================================================================
--- Source/WebCore/dom/Document.cpp	(revision 135771)
+++ Source/WebCore/dom/Document.cpp	(working copy)
@@ -794,14 +794,13 @@
 {
     if (m_compatibilityModeLocked || mode == m_compatibilityMode)
         return;
-    ASSERT(m_styleSheetCollection->activeAuthorStyleSheets().isEmpty());
     bool wasInQuirksMode = inQuirksMode();
     m_compatibilityMode = mode;
     selectorQueryCache()->invalidate();
     if (inQuirksMode() != wasInQuirksMode) {
         // All user stylesheets have to reparse using the different mode.
         m_styleSheetCollection->clearPageUserSheet();
-        m_styleSheetCollection->clearPageGroupUserSheets();
+        m_styleSheetCollection->invalidateInjectedStyleSheetCache();
     }
 }