Expose the selection root bounds in WebView.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 3c85d43798bb3be0d6975084f87b2a395a3f37d2..d638c750b7714f7edc71adbbf736e453f3c8277c 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -2144,6 +2144,31 @@ bool WebViewImpl::selectionBounds(WebRect& anchor, WebRect& focus) const
     return true;
 }
 
+bool WebViewImpl::selectionRootBounds(WebRect& bounds) const
+{
+    const LocalFrame* frame = focusedWebCoreFrame();
+    if (!frame)
+        return false;
+
+    Element* root = frame->selection().rootEditableElementOrDocumentElement();
+    if (!root)
+        return false;
+
+    // Special casing textarea because of http://crbug.com/348945
+    if (root->shadowHost()

[tkent, 2014/03/05 04:48:10]

nit: You don't need to wrap this line.

[mlamouri (slow - plz ping), 2014/03/05 09:52:45]

Done.

+        && root->shadowHost()->hasTagName(HTMLNames::textareaTag)) {
+        root = root->shadowHost();
+    }
+
+    IntRect boundingBox = root->pixelSnappedBoundingBox();
+    boundingBox =

[tkent, 2014/03/05 04:48:10]

nit: You don't need to wrap this line.

[mlamouri (slow - plz ping), 2014/03/05 09:52:45]

Done.

+        root->document().frame()->view()->contentsToWindow(boundingBox);
+    boundingBox.scale(pageScaleFactor());
+    bounds = boundingBox;
+
+    return true;
+}
+
 InputMethodContext* WebViewImpl::inputMethodContext()
 {
     if (!m_imeAcceptEvents)