add HitTestCanvasResult Class instend of std::pair<Element*, String>

third_party/WebKit/Source/core/layout/HitTestResult.cpp

Index: third_party/WebKit/Source/core/layout/HitTestResult.cpp
diff --git a/third_party/WebKit/Source/core/layout/HitTestResult.cpp b/third_party/WebKit/Source/core/layout/HitTestResult.cpp
index ff3418d3f781012d1aef1065f04999c98ff84b56..99861c6c946ae6dfed0fa535f325ed28b70b064f 100644
--- a/third_party/WebKit/Source/core/layout/HitTestResult.cpp
+++ b/third_party/WebKit/Source/core/layout/HitTestResult.cpp
@@ -83,6 +83,7 @@ HitTestResult::HitTestResult(const HitTestRequest& otherRequest, const HitTestLo
 HitTestResult::HitTestResult(const HitTestResult& other)
     : m_hitTestLocation(other.m_hitTestLocation)
     , m_hitTestRequest(other.m_hitTestRequest)
+    , m_hitTestCanvasResult(other.m_hitTestCanvasResult)
     , m_cacheable(other.m_cacheable)
     , m_innerNode(other.innerNode())
     , m_innerPossiblyPseudoNode(other.m_innerPossiblyPseudoNode)
@@ -104,6 +105,7 @@ HitTestResult& HitTestResult::operator=(const HitTestResult& other)
 {
     m_hitTestLocation = other.m_hitTestLocation;
     m_hitTestRequest = other.m_hitTestRequest;
+    m_hitTestCanvasResult = other.m_hitTestCanvasResult;
     populateFromCachedResult(other);
 
     return *this;
@@ -149,6 +151,7 @@ DEFINE_TRACE(HitTestResult)
     visitor->trace(m_innerURLElement);
     visitor->trace(m_scrollbar);
     visitor->trace(m_listBasedTestResult);
+    visitor->trace(m_hitTestCanvasResult);
 }
 
 PositionWithAffinity HitTestResult::position() const
@@ -223,6 +226,11 @@ void HitTestResult::setScrollbar(Scrollbar* s)
     m_scrollbar = s;
 }
 
+void HitTestResult::setHitCanvasRegion(HitTestCanvasResult* n)

[zino, 2016/08/19 18:00:07]

You are saving HitTestCanvasResult to HitTestResult but it can't be used because
there is no getter.
Also, you are not using HitTestResult directly in this patch. So, You can remove
this?

[Hwanseung Lee, 2016/08/20 06:03:54]

Done.

+{
+    m_hitTestCanvasResult = n;
+}
+
 LocalFrame* HitTestResult::innerNodeFrame() const
 {
     if (m_innerNode)