Revert of Add tokens and entry points for KHR_blend_equation_advanced

src/gpu/gl/GrGLInterface.cpp

Index: src/gpu/gl/GrGLInterface.cpp
diff --git a/src/gpu/gl/GrGLInterface.cpp b/src/gpu/gl/GrGLInterface.cpp
index 89f1f9ba65cda6671eff1ee548483b9ecb8c85ee..da1c3fc0e13b2d57207ea4f813248a2eb9d4978c 100644
--- a/src/gpu/gl/GrGLInterface.cpp
+++ b/src/gpu/gl/GrGLInterface.cpp
@@ -114,9 +114,8 @@
         NULL == fFunctions.fBindAttribLocation ||
         NULL == fFunctions.fBindBuffer ||
         NULL == fFunctions.fBindTexture ||
-        NULL == fFunctions.fBlendColor ||      // -> GL >= 1.4 or extension, ES >= 2.0
-        NULL == fFunctions.fBlendEquation ||   // -> GL >= 1.4 or extension, ES >= 2.0
         NULL == fFunctions.fBlendFunc ||
+        NULL == fFunctions.fBlendColor ||      // -> GL >= 1.4, ES >= 2.0 or extension
         NULL == fFunctions.fBufferData ||
         NULL == fFunctions.fBufferSubData ||
         NULL == fFunctions.fClear ||
@@ -322,13 +321,6 @@
         }
     }
 
-    if (fExtensions.has("GL_KHR_blend_equation_advanced") ||
-        fExtensions.has("GL_NV_blend_equation_advanced")) {
-        if (NULL == fFunctions.fBlendBarrier) {
-            RETURN_FALSE_INTERFACE
-        }
-    }
-
     if (fExtensions.has("GL_EXT_discard_framebuffer")) {
 // FIXME: Remove this once Chromium is updated to provide this function
 #if 0