Add default implementations for WebViewClient and WebWidgetClient...

webkit/api/public/WebWidgetClient.h

Index: webkit/api/public/WebWidgetClient.h
===================================================================
--- webkit/api/public/WebWidgetClient.h	(revision 30823)
+++ webkit/api/public/WebWidgetClient.h	(working copy)
@@ -33,54 +33,54 @@
 
 #include "WebCommon.h"
 #include "WebNavigationPolicy.h"
+#include "WebRect.h"
+#include "WebScreenInfo.h"
 
 namespace WebKit {
     class WebWidget;
     struct WebCursorInfo;
-    struct WebRect;
-    struct WebScreenInfo;
 
     class WebWidgetClient {
     public:
         // Called when a region of the WebWidget needs to be re-painted.
-        virtual void didInvalidateRect(const WebRect&) = 0;
+        virtual void didInvalidateRect(const WebRect&) { }
 
         // Called when a region of the WebWidget, given by clipRect, should be
         // scrolled by the specified dx and dy amounts.
-        virtual void didScrollRect(int dx, int dy, const WebRect& clipRect) = 0;
+        virtual void didScrollRect(int dx, int dy, const WebRect& clipRect) { }
 
         // Called when the widget acquires or loses focus, respectively.
-        virtual void didFocus() = 0;
-        virtual void didBlur() = 0;
+        virtual void didFocus() { }
+        virtual void didBlur() { }
 
         // Called when the cursor for the widget changes.
-        virtual void didChangeCursor(const WebCursorInfo&) = 0;
+        virtual void didChangeCursor(const WebCursorInfo&) { }
 
         // Called when the widget should be closed.  WebWidget::close() should
         // be called asynchronously as a result of this notification.
-        virtual void closeWidgetSoon() = 0;
+        virtual void closeWidgetSoon() { }
 
         // Called to show the widget according to the given policy.
-        virtual void show(WebNavigationPolicy) = 0;
+        virtual void show(WebNavigationPolicy) { }
 
         // Called to block execution of the current thread until the widget is
         // closed.
-        virtual void runModal() = 0;
+        virtual void runModal() { }
 
         // Called to get/set the position of the widget in screen coordinates.
-        virtual WebRect windowRect() = 0;
-        virtual void setWindowRect(const WebRect&) = 0;
+        virtual WebRect windowRect() { return WebRect(); }
+        virtual void setWindowRect(const WebRect&) { }
 
         // Called to get the position of the resizer rect in window coordinates.
-        virtual WebRect windowResizerRect() = 0;
+        virtual WebRect windowResizerRect() { return WebRect(); }
 
         // Called to get the position of the root window containing the widget
         // in screen coordinates.
-        virtual WebRect rootWindowRect() = 0;
+        virtual WebRect rootWindowRect() { return WebRect(); }
 
         // Called to query information about the screen where this widget is
         // displayed.
-        virtual WebScreenInfo screenInfo() = 0;
+        virtual WebScreenInfo screenInfo() { return WebScreenInfo(); }
 
     protected:
         ~WebWidgetClient() { }