Expose the selection root bounds in WebView.

public/web/WebWidget.h

Index: public/web/WebWidget.h
diff --git a/public/web/WebWidget.h b/public/web/WebWidget.h
index 10ad2912191bb0750c0e60ee673b856d11d07c1b..e14244f499285bf8c1ceb18ac6179543299544eb 100644
--- a/public/web/WebWidget.h
+++ b/public/web/WebWidget.h
@@ -194,6 +194,11 @@ public:
     // If the selection range is empty, it returns the caret bounds.
     virtual bool selectionBounds(WebRect& anchor, WebRect& focus) const { return false; }
 
+    // Compute the bounds of the root element of the current selection and fills
+    // the out-parameter on success.
+    // Returns false if there is no selection or on failure.
+    virtual bool selectionRootBounds(WebRect& bounds) const { return false; }

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

* Why do you add this function to WebWidget though only WebViewImpl has an
implementation?

* For consistency with Chromium style, please add "get" prefix, and use a
pointer for an out argument.
    virtual bool getSelectionRootBounds(WebRect* bounds) const ...

* Please document coordination system of the resultant WebRect.

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

Done.

+
     // Called to notify that IME candidate window has changed its visibility or
     // its appearance. These calls correspond to trigger
     // candidatewindow{show,update,hide} events defined in W3C IME API.