Wrap NV_path_rendering API with GrGLPathRendering

src/gpu/gl/GrGpuGL.h

Index: src/gpu/gl/GrGpuGL.h
diff --git a/src/gpu/gl/GrGpuGL.h b/src/gpu/gl/GrGpuGL.h
index e67197219d8c389b26c128342c6fb2f639777f86..b39aedb82417f273e552c7adf53dbf463eb207ab 100644
--- a/src/gpu/gl/GrGpuGL.h
+++ b/src/gpu/gl/GrGpuGL.h
@@ -24,7 +24,7 @@
 #define PROGRAM_CACHE_STATS
 #endif
 
-class GrGLNameAllocator;
+class GrGLPathRendering;
 
 class GrGpuGL : public GrGpu {
 public:
@@ -40,6 +40,11 @@ public:
     GrGLSLGeneration glslGeneration() const { return fGLContext.glslGeneration(); }
     const GrGLCaps& glCaps() const { return *fGLContext.caps(); }
 
+    GrGLPathRendering* pathRendering() const {
+        SkASSERT(glCaps().pathRenderingSupport());
+        return fPathRendering.get();
+    }
+
     virtual void discard(GrRenderTarget*) SK_OVERRIDE;
 
     // Used by GrGLProgram and GrGLPathTexGenProgramEffects to configure OpenGL
@@ -104,11 +109,6 @@ public:
         fHWGeometryState.notifyIndexBufferDelete(id);
     }
 
-    // These functions should be used to generate and delete GL path names. They have their own
-    // allocator that runs on the client side, so they are much faster than going through GenPaths.
-    GrGLuint createGLPathObject();
-    void deleteGLPathObject(GrGLuint);
-
 protected:
     virtual bool onCopySurface(GrSurface* dst,
                                GrSurface* src,
@@ -470,7 +470,7 @@ private:
     // from our loop that tries stencil formats and calls check fb status.
     int fLastSuccessfulStencilFmtIdx;
 
-    SkAutoTDelete<GrGLNameAllocator> fPathNameAllocator;
+    SkAutoTDelete<GrGLPathRendering> fPathRendering;
 
     typedef GrGpu INHERITED;
 };