Add glTexGen funcs to interface

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 0aba95eaed0e38177b970b749a04d7ca0a96ea66..fb6cb1c54d71978f69114f66bab48959b3a0c83a 100644
--- a/src/gpu/gl/GrGLInterface.cpp
+++ b/src/gpu/gl/GrGLInterface.cpp
@@ -44,6 +44,16 @@ bool GrGLInterface::validate(GrGLBinding binding) const {
         return false;
     }
 
+    bool isCoreProfile = false;
+    if (kDesktop_GrGLBinding == binding) {
+        if (NULL == this->fGetIntegerv) {
+            return false;
+        }
+        GrGLint profileMask = 0;
+        fGetIntegerv(GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
+        isCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
+    }
+
     // functions that are always required
     if (NULL == fActiveTexture ||
         NULL == fAttachShader ||
@@ -198,14 +208,19 @@ bool GrGLInterface::validate(GrGLBinding binding) const {
                 return false;
             }
         }
-        // The below two blocks are checks for functions used with
-        // GL_NV_path_rendering. We're not enforcing that they be non-NULL
-        // because they aren't actually called at this time.
-        if (false &&
-            (NULL == fMatrixMode ||
-             NULL == fLoadIdentity ||
-             NULL == fLoadMatrixf)) {
-            return false;
+        if (!isCoreProfile) {
+            if (NULL == fClientActiveTexture ||
+                NULL == fDisableClientState ||
+                NULL == fEnableClientState ||
+                NULL == fLoadIdentity ||
+                NULL == fLoadMatrixf ||
+                NULL == fMatrixMode ||
+                NULL == fTexGenf ||
+                NULL == fTexGenfv ||
+                NULL == fTexGeni ||
+                NULL == fVertexPointer) {
+                return false;
+            }
         }
         if (false && extensions.has("GL_NV_path_rendering")) {
             if (NULL == fPathCommands ||