libcc and webkit_compositor targets + stubs

cc/stubs/Extensions3D.h

Index: cc/stubs/Extensions3D.h
diff --git a/cc/stubs/Extensions3D.h b/cc/stubs/Extensions3D.h
new file mode 100644
index 0000000000000000000000000000000000000000..786c5bcd1b6d8f1d13fafa774279ed56e4a995c8
--- /dev/null
+++ b/cc/stubs/Extensions3D.h
@@ -0,0 +1,22 @@
+#ifndef CC_STUBS_EXTENSIONS3D_H_
+#define CC_STUBS_EXTENSIONS3D_H_
+
+#include "third_party/khronos/GLES2/gl2.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+
+namespace WebCore {
+
+class Extensions3D {
+public:
+    enum {
+        TEXTURE_RECTANGLE_ARB = GL_TEXTURE_RECTANGLE_ARB,
+        BGRA_EXT = GL_BGRA_EXT,
+        RGBA8_OES = GL_RGBA8_OES,
+    };
+};
+
+}
+
+
+#endif  // CC_STUBS_EXTENSIONS3D_H_
+