Add GL_ARB_invalidate_subdata functions to GrGLInterface.

BUG=skia:1541
R=egdaniel@google.com

Review URL: https://codereview.chromium.org/217503003

git-svn-id: http://skia.googlecode.com/svn/trunk@14004 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/gpu/gl/GrGLInterface.h b/include/gpu/gl/GrGLInterface.h
index 3d34ae6..c403ce4 100644
--- a/include/gpu/gl/GrGLInterface.h
+++ b/include/gpu/gl/GrGLInterface.h
@@ -222,6 +222,12 @@
         GLPtr<GrGLGetTexLevelParameterivProc> fGetTexLevelParameteriv;
         GLPtr<GrGLGetUniformLocationProc> fGetUniformLocation;
         GLPtr<GrGLInsertEventMarkerProc> fInsertEventMarker;
+        GLPtr<GrGLInvalidateBufferDataProc> fInvalidateBufferData;
+        GLPtr<GrGLInvalidateBufferSubDataProc> fInvalidateBufferSubData;
+        GLPtr<GrGLInvalidateFramebufferProc> fInvalidateFramebuffer;
+        GLPtr<GrGLInvalidateSubFramebufferProc> fInvalidateSubFramebuffer;
+        GLPtr<GrGLInvalidateTexImageProc> fInvalidateTexImage;
+        GLPtr<GrGLInvalidateTexSubImageProc> fInvalidateTexSubImage;
         GLPtr<GrGLLineWidthProc> fLineWidth;
         GLPtr<GrGLLinkProgramProc> fLinkProgram;
         GLPtr<GrGLLoadIdentityProc> fLoadIdentity;