Avoid absoluteImageURL() creating data URLs for canvas by default.

Source/core/rendering/HitTestResult.cpp

Index: Source/core/rendering/HitTestResult.cpp
diff --git a/Source/core/rendering/HitTestResult.cpp b/Source/core/rendering/HitTestResult.cpp
index 8adfdb5409e5ae43551ad227af2eec6d83991285..96fdf8f42f756621a563d7b7eb751cdb6f7158c8 100644
--- a/Source/core/rendering/HitTestResult.cpp
+++ b/Source/core/rendering/HitTestResult.cpp
@@ -284,6 +284,16 @@ IntRect HitTestResult::imageRect() const
 
 KURL HitTestResult::absoluteImageURL() const
 {
+    return absoluteImageURLInternal(false);
+}
+
+KURL HitTestResult::absoluteImageURLIncludingCanvasDataURL() const
+{
+    return absoluteImageURLInternal(true);
+}
+
+KURL HitTestResult::absoluteImageURLInternal(bool allowCanvas) const
+{
     if (!m_innerNonSharedNode)
         return KURL();
 
@@ -292,7 +302,7 @@ KURL HitTestResult::absoluteImageURL() const
         return KURL();
 
     AtomicString urlString;
-    if (isHTMLCanvasElement(*m_innerNonSharedNode)
+    if ((allowCanvas && isHTMLCanvasElement(*m_innerNonSharedNode))
         || isHTMLEmbedElement(*m_innerNonSharedNode)
         || isHTMLImageElement(*m_innerNonSharedNode)
         || isHTMLInputElement(*m_innerNonSharedNode)