[CSS] -webkit-var must be case sensitive according to specs

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 32d63a0bcfa7130e5b007de7b28550cd4e6f33e5..3063c95ac5e2cc3d290d3f8b2ed9a24d9283a08b 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -23,6 +23,7 @@
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
+#include "core/editing/FrameSelection.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "core/page/Frame.h"
@@ -60,6 +61,7 @@ RenderView::RenderView(Document* document)
     , m_firstLazyBlock(0)
     , m_renderQuoteHead(0)
     , m_renderCounterCount(0)
+    , m_selectionWasCaret(false)
 {
     // init RenderObject attributes
     setInline(false);
@@ -670,9 +672,11 @@ void RenderView::setSelection(RenderObject* start, int startPos, RenderObject* e
     if ((start && !end) || (end && !start))
         return;
 
+    bool caretChanged = m_selectionWasCaret != view()->frame()->selection()->isCaret();
+    m_selectionWasCaret = view()->frame()->selection()->isCaret();
     // Just return if the selection hasn't changed.
     if (m_selectionStart == start && m_selectionStartPos == startPos &&
-        m_selectionEnd == end && m_selectionEndPos == endPos)
+        m_selectionEnd == end && m_selectionEndPos == endPos && !caretChanged)
         return;
 
     if ((start && end) && (start->flowThreadContainingBlock() != end->flowThreadContainingBlock()))