Make WebLocalFrameImpl to use VisibleSelection::toNormalizedEphemeralRange()...

Make WebLocalFrameImpl to use VisibleSelection::toNormalizedEphemeralRange() instead of toNormalizedRange()

This patch changes |WebLocalFrameImpl| class to use |toNormalizedEphemeralRange()|
in |VisibleSelection| class instead of |toNormalizedRange()| as a preparation
of templatizing |VisibleSelection| to use templatized positions instead of
DOM position to represent range.

This patch is a preparation of making selection to handle granularity for web
component, http://crrev.com/1277863002

BUG=513568
TEST=n/a; no behavior changes

Review URL: https://codereview.chromium.org/1313013002

git-svn-id: svn://svn.chromium.org/blink/trunk@201123 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

@@ -1240,7 +1240,7 @@ bool WebLocalFrameImpl::hasSelection() const
 
 WebRange WebLocalFrameImpl::selectionRange() const
 {
-    return frame()->selection().toNormalizedRange();
+    return createRange(frame()->selection().selection().toNormalizedEphemeralRange());
 }
 
 WebString WebLocalFrameImpl::selectionAsText() const