Make WebGL objects scriptwrappable so that binding integrity checks may be applied to them.

Source/core/html/canvas/EXTDrawBuffers.h

Index: Source/core/html/canvas/EXTDrawBuffers.h
diff --git a/Source/core/html/canvas/EXTDrawBuffers.h b/Source/core/html/canvas/EXTDrawBuffers.h
index ac61aeccbb5201886f302c02429e65e66ae6c49e..c47fe2aa4753c2ce9a9fe06d73e3209d1cc52f77 100644
--- a/Source/core/html/canvas/EXTDrawBuffers.h
+++ b/Source/core/html/canvas/EXTDrawBuffers.h
@@ -26,12 +26,13 @@
 #ifndef EXTDrawBuffers_h
 #define EXTDrawBuffers_h
 
+#include "bindings/v8/ScriptWrappable.h"
 #include "core/html/canvas/WebGLExtension.h"
-#include <wtf/PassOwnPtr.h>
+#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-class EXTDrawBuffers : public WebGLExtension {
+class EXTDrawBuffers : public WebGLExtension, public ScriptWrappable {
 public:
     static PassOwnPtr<EXTDrawBuffers> create(WebGLRenderingContext*);
     static bool supported(WebGLRenderingContext*);