ImageOperations::Resize to handle OOM.

ImageOperations::Resize must allocate a backing buffer for the resized
image. It is already attempting to handle OOM by returning an empty
image on failure. However, it is calling allocPixels which will crash if
the allocation is not satisfiable instead of tryAllocPixels which can
return a status to state if the allocation succeeded.

Bug: chromium:1182512
Change-Id: I44843f681655029f45c235c325acaec3588b64a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2737215
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Ben Wagner <bungeman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#860005}

skia/ext/image_operations.cc

@@ -375,8 +375,7 @@ SkBitmap ImageOperations::Resize(const SkPixmap& source,
   SkBitmap result;
   result.setInfo(
       source.info().makeWH(dest_subset.width(), dest_subset.height()));
-  result.allocPixels(allocator);
-  if (!result.readyToDraw())
+  if (!result.tryAllocPixels(allocator) || !result.readyToDraw())
     return SkBitmap();
 
   BGRAConvolve2D(source_subset, static_cast<int>(source.rowBytes()),