Made Blink tooltip ShadowDOM-aware

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 7b0694461feee95e26ae01e508e2d19c008bc7d1..7da6a3a5260606d241f1e00694ada3e79ee81203 100644
--- a/Source/core/rendering/HitTestResult.cpp
+++ b/Source/core/rendering/HitTestResult.cpp
@@ -24,6 +24,7 @@
 
 #include "HTMLNames.h"
 #include "core/dom/DocumentMarkerController.h"
+#include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/Editor.h"
 #include "core/editing/FrameSelection.h"
 #include "core/html/HTMLAnchorElement.h"
@@ -112,16 +113,34 @@ HitTestResult& HitTestResult::operator=(const HitTestResult& other)
     return *this;
 }
 
-void HitTestResult::setToNonShadowAncestor()
+void HitTestResult::setToNodesInDocumentTreeScope()

[dglazkov, 2013/05/13 16:11:42]

It's not necessarily document tree scope, right? You're just looking one up?

 {
-    Node* node = innerNode();
-    if (node)
+    if (Node* node = innerNode()) {
         node = node->document()->ancestorInThisScope(node);

[Hajime Morrita, 2013/05/14 00:13:53]

This asks document()->ancestorInThisScope(), which has while() in it.

-    setInnerNode(node);
-    node = innerNonSharedNode();
-    if (node)
+        setInnerNode(node);
+    }
+
+    if (Node* node = innerNonSharedNode()) {
         node = node->document()->ancestorInThisScope(node);
-    setInnerNonSharedNode(node);
+        setInnerNonSharedNode(node);
+    }
+}
+
+void HitTestResult::setToShadowHostIfInUserAgentShadowRoot()
+{
+    if (Node* node = innerNode()) {
+        if (ShadowRoot* containingShadowRoot = node->containingShadowRoot()) {
+            if (containingShadowRoot->type() == ShadowRoot::UserAgentShadowRoot)
+                setInnerNode(node->shadowHost());
+        }
+    }
+
+    if (Node* node = innerNonSharedNode()) {
+        if (ShadowRoot* containingShadowRoot = node->containingShadowRoot()) {
+            if (containingShadowRoot->type() == ShadowRoot::UserAgentShadowRoot)
+                setInnerNonSharedNode(node->shadowHost());
+        }
+    }
 }
 
 void HitTestResult::setInnerNode(Node* n)