Use the font height as caret height instead of the line height

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

Index: third_party/WebKit/Source/core/layout/LayoutText.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutText.cpp b/third_party/WebKit/Source/core/layout/LayoutText.cpp
index a9ee24e75b8780537e5ceabc1b923e9a3775df45..950d189cf64fab7e3f440c588a4a854cd49d0ff5 100644
--- a/third_party/WebKit/Source/core/layout/LayoutText.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutText.cpp
@@ -731,8 +731,9 @@ LayoutRect LayoutText::localCaretRect(InlineBox* inlineBox,
 
   InlineTextBox* box = toInlineTextBox(inlineBox);
 
-  int height = box->root().selectionHeight().toInt();
-  int top = box->root().selectionTop().toInt();
+  int height = (box->root().selectionBottom() -
+      box->root().lineTop()).clampNegativeToZero().toInt();
+  int top = box->root().lineTop().toInt();
 
   // Go ahead and round left to snap it to the nearest pixel.
   LayoutUnit left = box->positionForOffset(caretOffset);