stub webkit/child/ and webkitplatformsupport_child_impl for transition

content/child/webkitplatformsupport_impl.h

Index: content/child/webkitplatformsupport_impl.h
diff --git a/content/child/webkitplatformsupport_impl.h b/content/child/webkitplatformsupport_impl.h
index a5675098d067ffaa776bf82e66cd295f32c493fc..2c7e0635db0b3eb470474227a169cff00e5914d5 100644
--- a/content/child/webkitplatformsupport_impl.h
+++ b/content/child/webkitplatformsupport_impl.h
@@ -8,14 +8,14 @@
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
 #include "ui/base/layout.h"
-#include "webkit/glue/webkitplatformsupport_impl.h"
+#include "webkit/child/webkitplatformsupport_child_impl.h"
 
 namespace content {
 
 // This is a specialization of WebKitPlatformSupportImpl that implements the
 // embedder functions in terms of ContentClient.
 class CONTENT_EXPORT WebKitPlatformSupportImpl
-    : NON_EXPORTED_BASE(public webkit_glue::WebKitPlatformSupportImpl) {
+    : NON_EXPORTED_BASE(public webkit_glue::WebKitPlatformSupportChildImpl) {
  public:
   typedef WebKit::WebGraphicsContext3D* (OffscreenContextFactory)();