Add image functions to GrGLInterface

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4840

Change-Id: I250cc4e637765c321c90e33c9b3f25c4ad12fe04
Reviewed-on: https://skia-review.googlesource.com/4840
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/include/gpu/gl/GrGLInterface.h b/include/gpu/gl/GrGLInterface.h
index 60109ec..3afa6be 100644
--- a/include/gpu/gl/GrGLInterface.h
+++ b/include/gpu/gl/GrGLInterface.h
@@ -116,6 +116,7 @@
         GrGLFunction<GrGLBindFramebufferProc> fBindFramebuffer;
         GrGLFunction<GrGLBindRenderbufferProc> fBindRenderbuffer;
         GrGLFunction<GrGLBindTextureProc> fBindTexture;
+        GrGLFunction<GrGLBindImageTextureProc> fBindImageTexture;
         GrGLFunction<GrGLBindVertexArrayProc> fBindVertexArray;
         GrGLFunction<GrGLBlendBarrierProc> fBlendBarrier;
         GrGLFunction<GrGLBlendColorProc> fBlendColor;
@@ -207,6 +208,8 @@
         GrGLFunction<GrGLMapBufferRangeProc> fMapBufferRange;
         GrGLFunction<GrGLMapBufferSubDataProc> fMapBufferSubData;
         GrGLFunction<GrGLMapTexSubImage2DProc> fMapTexSubImage2D;
+        GrGLFunction<GrGLMemoryBarrierProc> fMemoryBarrier;
+        GrGLFunction<GrGLMemoryBarrierByRegionProc> fMemoryBarrierByRegion;
         GrGLFunction<GrGLMultiDrawArraysIndirectProc> fMultiDrawArraysIndirect;
         GrGLFunction<GrGLMultiDrawElementsIndirectProc> fMultiDrawElementsIndirect;
         GrGLFunction<GrGLPixelStoreiProc> fPixelStorei;