Check all scratch texture allocations for image filters.

Check all scratch texture allocations for image filters.

[Cherry-picked from 673d9732bf37df724500e04afcdf27d5c711ef60 to
chrome/m38_2125.]

BUG=403677
TBR=bungeman@google.com

Committed: https://skia.googlesource.com/skia/+/7f8c54c

[Stephen White, 2014-08-22 15:33:49]

The CQ bit was checked by senorblanco@chromium.org

[commit-bot: I haz the power, 2014-08-22 15:34:48]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/senorblanco@chromium.org/474443003/1

[commit-bot: I haz the power, 2014-08-22 15:34:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-08-22 15:34:54]

Failed to apply patch for src/core/SkImageFilter.cpp:
While running git apply --index -p1;
  error: patch failed: src/core/SkImageFilter.cpp:256
  error: src/core/SkImageFilter.cpp: patch does not apply

Patch:       src/core/SkImageFilter.cpp
Index: src/core/SkImageFilter.cpp
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index
cf1f07696b92270b5a6225791f4715bc147b619f..4a9a22e63445bde4b0c6705403fe0dc08ee31805
100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -256,6 +256,9 @@ bool SkImageFilter::filterImageGPU(Proxy* proxy, const
SkBitmap& src, const Cont
     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());

[Stephen White, 2014-08-22 15:36:40]

Committed patchset #1 manually as 7f8c54c (presubmit successful).