Convert GrClip to an abstract base class

tools/gpu/GrTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTest.h"
 
 #include "GrBatchAtlas.h"
@@ skipping 150 matching lines @@
     }
     SkMatrix textureMat;
     textureMat.reset();
     textureMat[SkMatrix::kMScaleX] = 1.0f/dst.width();
     textureMat[SkMatrix::kMScaleY] = 1.0f/dst.height();
     textureMat[SkMatrix::kMTransX] = -dst.fLeft/dst.width();
     textureMat[SkMatrix::kMTransY] = -dst.fTop/dst.height();
 
     grPaint.addColorTextureProcessor(tex, textureMat);
 
-    GrClip clip;
-    fDrawContext->drawRect(clip, grPaint, mat, dst);
+    fDrawContext->drawRect(GrNoClip(), grPaint, mat, dst);
 }
 
 
 #if GR_GPU_STATS
 void GrGpu::Stats::dump(SkString* out) {
     out->appendf("Render Target Binds: %d\n", fRenderTargetBinds);
     out->appendf("Shader Compilations: %d\n", fShaderCompilations);
     out->appendf("Textures Created: %d\n", fTextureCreates);
     out->appendf("Texture Uploads: %d\n", fTextureUploads);
     out->appendf("Transfers to Texture: %d\n", fTransfersToTexture);
@@ skipping 70 matching lines @@
 #define RETURN_IF_ABANDONED        if (fDrawContext->fDrawingManager->abandoned()) { return; }
 
 void GrDrawContextPriv::testingOnly_drawBatch(const GrPipelineBuilder& pipelineBuilder,
                                               GrDrawBatch* batch,
                                               const GrClip* clip) {
     ASSERT_SINGLE_OWNER
     RETURN_IF_ABANDONED
     SkDEBUGCODE(fDrawContext->validate();)
     GR_AUDIT_TRAIL_AUTO_FRAME(fDrawContext->fAuditTrail, "GrDrawContext::testingOnly_drawBatch");
 
-    const GrClip& drawClip = clip ? *clip : GrClip::WideOpen();
-    fDrawContext->getDrawTarget()->drawBatch(pipelineBuilder, drawClip, batch);
+    if (clip) {
+        fDrawContext->getDrawTarget()->drawBatch(pipelineBuilder, *clip, batch);
+    } else {
+        fDrawContext->getDrawTarget()->drawBatch(pipelineBuilder, GrNoClip(), batch);
+    }
 }
 
 #undef ASSERT_SINGLE_OWNER
 #undef RETURN_IF_ABANDONED
 
 ///////////////////////////////////////////////////////////////////////////////
 // Code for the mock context. It's built on a mock GrGpu class that does nothing.
 ////
 
 #include "GrGpu.h"
@@ skipping 138 matching lines @@
     SkASSERT(nullptr == fGpu);
     fGpu = new MockGpu(this, options);
     SkASSERT(fGpu);
     this->initCommon(options);
 
     // We delete these because we want to test the cache starting with zero resources. Also, none of
     // these objects are required for any of tests that use this context. TODO: make stop allocating
     // resources in the buffer pools.
     fDrawingManager->abandon();
 }