Implement support for CHROMIUM_path_rendering pseudo extension

src/gpu/gl/GrGLPathRendering.h

Index: src/gpu/gl/GrGLPathRendering.h
diff --git a/src/gpu/gl/GrGLPathRendering.h b/src/gpu/gl/GrGLPathRendering.h
index 86cf1b1698ac8aed0e6f3d18d119ffb8a6588ce6..5996e906bd5088c2adfdb83a1cff5092372dd51a 100644
--- a/src/gpu/gl/GrGLPathRendering.h
+++ b/src/gpu/gl/GrGLPathRendering.h
@@ -46,6 +46,10 @@ public:
      */
     void abandonGpuResources();
 
+    bool shouldBindFragmentInputs() const {
+        return fCaps.bindFragmentInputSupport;
+    }
+
     // Functions for "separable shader" texturing support.
     void setProgramPathFragmentInputTransform(GrGLuint program, GrGLint location,
                                               GrGLenum genMode, GrGLint components,
@@ -65,6 +69,13 @@ protected:
     void onDrawPaths(const DrawPathArgs&, const GrPathRange*, const void* indices, PathIndexType,
                      const float transformValues[], PathTransformType, int count) override;
 private:
+    /**
+     * Mark certain functionality as not supported.
+     */
+    struct Caps {
+        bool bindFragmentInputSupport : 1;
+    };
+
     void flushPathStencilSettings(const GrStencilSettings&);
 
     struct MatrixState {
@@ -103,6 +114,7 @@ private:
     SkAutoTDelete<GrGLNameAllocator> fPathNameAllocator;
     MatrixState fHWProjectionMatrixState;
     GrStencilSettings fHWPathStencilSettings;
+    Caps fCaps;
 };
 
 #endif