Move GL-specific include files to their own subdirectory, to better
coexist alongside D3D backend.
Requires gyp change.

http://codereview.appspot.com/5665045/



git-svn-id: http://skia.googlecode.com/svn/trunk@3185 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLCreateNullInterface.cpp b/src/gpu/gl/GrGLCreateNullInterface.cpp
index cdac75f..5095079 100644
--- a/src/gpu/gl/GrGLCreateNullInterface.cpp
+++ b/src/gpu/gl/GrGLCreateNullInterface.cpp
@@ -7,7 +7,7 @@
  */
 
 
-#include "GrGLInterface.h"
+#include "gl/GrGLInterface.h"
 #include "../GrTDArray.h"
 
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLActiveTexture(GrGLenum texture) {}