Check all scratch texture allocations for image filters.

src/core/SkImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 238 matching lines @@
     SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
     GrContext* context = srcTexture->getContext();
 
     GrTextureDesc desc;
     desc.fFlags = kRenderTarget_GrTextureFlagBit,
     desc.fWidth = bounds.width();
     desc.fHeight = bounds.height();
     desc.fConfig = kRGBA_8888_GrPixelConfig;
 
     GrAutoScratchTexture dst(context, desc);
+    if (NULL == dst.texture()) {
+        return false;
+    }
     GrContext::AutoMatrix am;
     am.setIdentity(context);
     GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget());
     GrContext::AutoClip acs(context, dstRect);
     GrEffect* effect;
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     bounds.offset(-srcOffset);
     SkMatrix matrix(ctx.ctm());
     matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
@@ skipping 220 matching lines @@
 } // namespace
 
 SkImageFilter::Cache* SkImageFilter::Cache::Create(size_t maxBytes) {
     return SkNEW_ARGS(CacheImpl, (maxBytes));
 }
 
 SkImageFilter::Cache* SkImageFilter::Cache::Get() {
     SK_DECLARE_STATIC_LAZY_PTR(SkImageFilter::Cache, cache, CreateCache);
     return cache.get();
 }