Define clear regions in terms of GrFixedClip

src/gpu/gl/GrGLGpu.h

Index: src/gpu/gl/GrGLGpu.h
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index 26c9588fcc3396ba78adc29a91cfb693759a72d6..296f72658d9acfb69690904df9d90270e4e7c98a 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -105,12 +105,12 @@ public:
     // The GrGLGpuCommandBuffer does not buffer up draws before submitting them to the gpu.
     // Thus this is the implementation of the clear call for the corresponding passthrough function
     // on GrGLGpuCommandBuffer.
-    void clear(const SkIRect& rect, GrColor color, GrRenderTarget* renderTarget);
+    void clear(const GrFixedClip&, GrColor, GrRenderTarget*);
 
     // The GrGLGpuCommandBuffer does not buffer up draws before submitting them to the gpu.
     // Thus this is the implementation of the clearStencil call for the corresponding passthrough
     // function on GrGLGpuCommandBuffer.
-    void clearStencilClip(const SkIRect& rect, bool insideClip, GrRenderTarget* renderTarget);
+    void clearStencilClip(const GrFixedClip&, bool insideStencilMask, GrRenderTarget*);
 
     const GrGLContext* glContextForTesting() const override {
         return &this->glContext();