Don't allow renderTarget==NULL to GrContext::clear() and friends.

src/gpu/GrGpu.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpu.h"
@@ skipping 180 matching lines @@
             buffer->unmap();
         }
     }
     return buffer;
 }
 
 void GrGpu::clear(const SkIRect* rect,
                   GrColor color,
                   bool canIgnoreRect,
                   GrRenderTarget* renderTarget) {
-    if (NULL == renderTarget) {
-        renderTarget = this->getDrawState().getRenderTarget();
-    }
-    if (NULL == renderTarget) {
-        SkASSERT(0);
-        return;
-    }
+    SkASSERT(renderTarget);
     this->handleDirtyContext();
     this->onClear(renderTarget, rect, color, canIgnoreRect);
 }
 
 void GrGpu::clearStencilClip(const SkIRect& rect,
                              bool insideClip,
                              GrRenderTarget* renderTarget) {
     if (NULL == renderTarget) {
         renderTarget = this->getDrawState().getRenderTarget();
     }
@@ skipping 342 matching lines @@
 }
 
 void GrGpu::releaseIndexArray() {
     // if index source was array, we stowed data in the pool
     const GeometrySrcState& geoSrc = this->getGeomSrc();
     SkASSERT(kArray_GeometrySrcType == geoSrc.fIndexSrc);
     size_t bytes = geoSrc.fIndexCount * sizeof(uint16_t);
     fIndexPool->putBack(bytes);
     --fIndexPoolUseCnt;
 }