Make GrGLDefines.h be a private header

Review URL: http://codereview.appspot.com/6198048/



git-svn-id: http://skia.googlecode.com/svn/trunk@3851 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/gpu.gyp b/gyp/gpu.gyp
index 6f304d1..63dd6b2 100644
--- a/gyp/gpu.gyp
+++ b/gyp/gpu.gyp
@@ -201,7 +201,6 @@
 
         '../include/gpu/gl/GrGLConfig.h',
         '../include/gpu/gl/GrGLConfig_chrome.h',
-        '../include/gpu/gl/GrGLDefines.h',
         '../include/gpu/gl/GrGLInterface.h',
 
         '../src/gpu/GrAAHairLinePathRenderer.cpp',
@@ -284,6 +283,7 @@
         '../src/gpu/gl/GrGLCreateNullInterface.cpp',
         '../src/gpu/gl/GrGLDefaultInterface_none.cpp',
         '../src/gpu/gl/GrGLDefaultInterface_native.cpp',
+        '../src/gpu/gl/GrGLDefines.h',
         '../src/gpu/gl/GrGLIndexBuffer.cpp',
         '../src/gpu/gl/GrGLIndexBuffer.h',
         '../src/gpu/gl/GrGLInterface.cpp',