Introduce composed tree version of localCaretRectOfPosition()

Source/core/editing/VisibleUnitsTest.cpp

Index: Source/core/editing/VisibleUnitsTest.cpp
diff --git a/Source/core/editing/VisibleUnitsTest.cpp b/Source/core/editing/VisibleUnitsTest.cpp
index dd10dad9ce2131072af40c01a4b186bcef36c200..516004f258581ed349e9085e2a19de03532890ff 100644
--- a/Source/core/editing/VisibleUnitsTest.cpp
+++ b/Source/core/editing/VisibleUnitsTest.cpp
@@ -52,6 +52,26 @@ TEST_F(VisibleUnitsTest, inSameLine)
     EXPECT_TRUE(inSameLine(positionWithAffinityInComposedTree(*two->firstChild(), 0), positionWithAffinityInComposedTree(*four->firstChild(), 0)));
 }
 
+TEST_F(VisibleUnitsTest, localCaretRectOfPosition)
+{
+    const char* bodyContent = "<p id='host'><b id='one'>1</b></p><b id='two'>22</b>";
+    const char* shadowContent = "<b id='two'>22</b><content select=#one></content><b id='three'>333</b>";
+    setBodyContent(bodyContent);
+    setShadowContent(shadowContent);
+    updateLayoutAndStyleForPainting();
+
+    RefPtrWillBeRawPtr<Element> one = document().getElementById("one");
+
+    LayoutObject* layoutObjectFromDOMTree;
+    LayoutRect layoutRectFromDOMTree = localCaretRectOfPosition(Position(one, 0), layoutObjectFromDOMTree);
+
+    LayoutObject* layoutObjectFromComposedTree;
+    LayoutRect layoutRectFromComposedTree = localCaretRectOfPosition(PositionInComposedTree(one, 0), layoutObjectFromComposedTree);
+

[yoichio, 2015/08/25 10:07:09]

Could you add expectation that LayoutRect and LayoutObject are not null?

+    EXPECT_EQ(layoutObjectFromDOMTree, layoutObjectFromComposedTree);
+    EXPECT_EQ(layoutRectFromDOMTree, layoutRectFromComposedTree);
+}
+
 TEST_F(VisibleUnitsTest, mostBackwardCaretPositionAfterAnchor)
 {
     const char* bodyContent = "<p id='host'><b id='one'>1</b></p><b id='two'>22</b>";