Clean up vestiges of ScrollView.

Source/platform/Widget.h

Index: Source/platform/Widget.h
diff --git a/Source/platform/Widget.h b/Source/platform/Widget.h
index ffe2ac6e1dc1327645a8548d5c46e4b6553e23c6..1a8a170e792cea895be6f1f5386a25d5d22a1aae 100644
--- a/Source/platform/Widget.h
+++ b/Source/platform/Widget.h
@@ -40,13 +40,10 @@ class Event;
 class GraphicsContext;
 class HostWindow;
 
-// The Widget class serves as a base class for three kinds of objects:
-// (1) Scrollable areas (ScrollView)
-// (2) Scrollbars (Scrollbar)
-// (3) Plugins (PluginView)
+// The Widget class serves as a base class for FrameView, Scrollbar, and PluginView.
 //
 // Widgets are connected in a hierarchy, with the restriction that plugins and
-// scrollbars are always leaves of the tree. Only ScrollViews can have children
+// scrollbars are always leaves of the tree. Only FrameView can have children
 // (and therefore the Widget class has no concept of children).
 class PLATFORM_EXPORT Widget : public RefCounted<Widget> {
 public:
@@ -89,7 +86,6 @@ public:
     virtual bool isPluginContainer() const { return false; }
     virtual bool pluginShouldPersist() const { return false; }
     virtual bool isScrollbar() const { return false; }
-    virtual bool isScrollView() const { return false; }
 
     virtual HostWindow* hostWindow() const { ASSERT_NOT_REACHED(); return 0; }
     virtual void setParent(Widget*);
@@ -114,7 +110,7 @@ public:
     // Notifies this widget that other widgets on the page have been repositioned.
     virtual void widgetPositionsUpdated() { }
 
-    // Virtual methods to convert points to/from the containing ScrollView
+    // Virtual methods to convert points to/from the containing Widget
     virtual IntRect convertToContainingView(const IntRect&) const;
     virtual IntRect convertFromContainingView(const IntRect&) const;
     virtual IntPoint convertToContainingView(const IntPoint&) const;