Define clear regions in terms of GrFixedClip

src/gpu/gl/GrGLGpuCommandBuffer.h

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #ifndef GrGLGpuCommandBuffer_DEFINED
 #define GrGLGpuCommandBuffer_DEFINED
 
@@ skipping 21 matching lines @@
 
     void onSubmit(const SkIRect& bounds) override {}
 
     void onDraw(const GrPipeline& pipeline,
                 const GrPrimitiveProcessor& primProc,
                 const GrMesh* mesh,
                 int meshCount) override {
         fGpu->draw(pipeline, primProc, mesh, meshCount);
     }
 
-    void onClear(GrRenderTarget* rt, const SkIRect& rect, GrColor color) override {
-        fGpu->clear(rect, color, rt);
+    void onClear(GrRenderTarget* rt, const GrFixedClip& clip, GrColor color) override {
+        fGpu->clear(clip, color, rt);
     }
 
-    void onClearStencilClip(GrRenderTarget* rt, const SkIRect& rect, bool insideClip) override {
-        fGpu->clearStencilClip(rect, insideClip, rt);
+    void onClearStencilClip(GrRenderTarget* rt,
+                            const GrFixedClip& clip,
+                            bool insideStencilMask) override {
+        fGpu->clearStencilClip(clip, insideStencilMask, rt);
     }
 
     GrGLGpu*                    fGpu;
 
     typedef GrGpuCommandBuffer INHERITED;
 };
 
 #endif