Turn NVPR on by default (but off in tools).

src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp

Index: src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp
diff --git a/src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp b/src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp
index 2858541ed9c2bfdf75211d184cd4b4a87be609dc..1695c3c36f5d0a99d456435c4a00d6f7cee888ad 100644
--- a/src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp
+++ b/src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp
@@ -152,5 +152,10 @@ const GrGLInterface* GrGLCreateANGLEInterface() {
 
     functions->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBufferOES");
     functions->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBufferOES");
+
+    interface->fExtensions.init(kGLES_GrGLStandard,
+                                interface->fFunctions.fGetString,
+                                interface->fFunctions.fGetStringi,
+                                interface->fFunctions.fGetIntegerv);
     return interface;
 }