Remove rootWindowRect from WebWidgetClient and move it to WebViewClient.

third_party/WebKit/public/web/WebWidgetClient.h

Index: third_party/WebKit/public/web/WebWidgetClient.h
diff --git a/third_party/WebKit/public/web/WebWidgetClient.h b/third_party/WebKit/public/web/WebWidgetClient.h
index 42be33c4416ab7fde99a0203a2816f6048bbf70b..f245e631d2895a86a7fb8c1edcd416a973dcda50 100644
--- a/third_party/WebKit/public/web/WebWidgetClient.h
+++ b/third_party/WebKit/public/web/WebWidgetClient.h
@@ -101,10 +101,6 @@ public:
     // Called to get the position of the resizer rect in window coordinates.
     virtual WebRect windowResizerRect() { return WebRect(); }
 
-    // Called to get the position of the root window containing the widget
-    // in screen coordinates.
-    virtual WebRect rootWindowRect() { return WebRect(); }
-
     // Called to query information about the screen where this widget is
     // displayed.
     virtual WebScreenInfo screenInfo() { return WebScreenInfo(); }