Fix for GLES2 compilation error

nix_GLES2.patch

diff --git a/Source/WebCore/platform/graphics/OpenGLESShims.h b/Source/WebCore/platform/graphics/OpenGLESShims.h
index b495814..9683042 100644
--- a/Source/WebCore/platform/graphics/OpenGLESShims.h
+++ b/Source/WebCore/platform/graphics/OpenGLESShims.h
@@ -44,8 +44,12 @@
 #define glIsRenderbufferEXT glIsRenderbuffer
 #define glIsFramebufferEXT glIsFramebuffer
 #define glGenerateMipmapEXT glGenerateMipmap
+#ifndef GL_COLOR_ATTACHMENT0_EXT
 #define GL_COLOR_ATTACHMENT0_EXT GL_COLOR_ATTACHMENT0
+#endif
+#ifndef GL_DEPTH_ATTACHMENT_EXT
 #define GL_DEPTH_ATTACHMENT_EXT GL_DEPTH_ATTACHMENT
+#endif
 #define GL_FRAMEBUFFER_COMPLETE_EXT GL_FRAMEBUFFER_COMPLETE
 #define GL_FRAMEBUFFER_EXT GL_FRAMEBUFFER
 #define GL_DEPTH24_STENCIL8_EXT GL_DEPTH24_STENCIL8_OES
diff --git a/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGLCommon.cpp b/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGLCommon.cpp
index 174289b..786a323 100644
--- a/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGLCommon.cpp
+++ b/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGLCommon.cpp
@@ -37,9 +37,9 @@
 #endif
 
 #if USE(OPENGL_ES_2)
-#include "OpenGLESShims.h"
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
+#include "OpenGLESShims.h"
 #elif PLATFORM(MAC)
 #include <OpenGL/gl.h>
 #elif PLATFORM(GTK) || PLATFORM(EFL) || PLATFORM(WIN) || PLATFORM(NIX)