Stop using the NVPR glyph loading functionality

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 29a092adaec69ec8469db45b0f5e312ee5c8bf32..11cdaf3e4b26cfa31e45d3dde441e985a586e845 100644
--- a/src/gpu/gl/GrGLInterface.cpp
+++ b/src/gpu/gl/GrGLInterface.cpp
@@ -61,7 +61,6 @@ const GrGLInterface* GrGLInterfaceRemoveNVPR(const GrGLInterface* interface) {
     newInterface->fFunctions.fStencilThenCoverFillPathInstanced = NULL;
     newInterface->fFunctions.fStencilThenCoverStrokePathInstanced = NULL;
     newInterface->fFunctions.fProgramPathFragmentInputGen = NULL;
-    newInterface->fFunctions.fPathMemoryGlyphIndexArray = NULL;
     return newInterface;
 }
 
@@ -515,8 +514,7 @@ bool GrGLInterface::validate() const {
                 NULL == fFunctions.fStencilThenCoverStrokePath ||
                 NULL == fFunctions.fStencilThenCoverFillPathInstanced ||
                 NULL == fFunctions.fStencilThenCoverStrokePathInstanced ||
-                NULL == fFunctions.fProgramPathFragmentInputGen ||
-                NULL == fFunctions.fPathMemoryGlyphIndexArray) {
+                NULL == fFunctions.fProgramPathFragmentInputGen) {
                 RETURN_FALSE_INTERFACE
             }
         }