Add support for element ids in TargetedStyleRecalc

Source/core/css/invalidation/StyleInvalidator.h

Index: Source/core/css/invalidation/StyleInvalidator.h
diff --git a/Source/core/css/invalidation/StyleInvalidator.h b/Source/core/css/invalidation/StyleInvalidator.h
index 84878fd3a8075f1d41022b3524cb5044a9534b77..0be0ab10ca8c1b50b14c454e46b3454a859953ef 100644
--- a/Source/core/css/invalidation/StyleInvalidator.h
+++ b/Source/core/css/invalidation/StyleInvalidator.h
@@ -38,6 +38,7 @@ private:
 
         Vector<AtomicString> m_invalidationClasses;
         Vector<AtomicString> m_invalidationAttributes;
+        Vector<AtomicString> m_invalidationIds;
         bool m_foundInvalidationSet;
     };
 
@@ -46,6 +47,7 @@ private:
         RecursionCheckpoint(RecursionData* data)
             : m_prevClassLength(data->m_invalidationClasses.size()),
             m_prevAttributeLength(data->m_invalidationAttributes.size()),
+            m_prevIdLength(data->m_invalidationIds.size()),
             m_prevFoundInvalidationSet(data->m_foundInvalidationSet),
             m_data(data)
         { }
@@ -53,12 +55,14 @@ private:
         {
             m_data->m_invalidationClasses.remove(m_prevClassLength, m_data->m_invalidationClasses.size() - m_prevClassLength);
             m_data->m_invalidationAttributes.remove(m_prevAttributeLength, m_data->m_invalidationAttributes.size() - m_prevAttributeLength);
+            m_data->m_invalidationIds.remove(m_prevIdLength, m_data->m_invalidationIds.size() - m_prevIdLength);
             m_data->m_foundInvalidationSet = m_prevFoundInvalidationSet;
         }
 
     private:
         int m_prevClassLength;
         int m_prevAttributeLength;
+        int m_prevIdLength;
         bool m_prevFoundInvalidationSet;
         RecursionData* m_data;
     };