[PDF] Fix memory hungry inefficiency in pdf resource tracking.

[PDF] Fix memory hungry inefficiency in pdf resource tracking.

When moving the content of a device into a PDF object like SkPDFFormXObject
or SkPDFShader does, we only need the top level resources in the new object's
resource list, not the recursive set of objects.  Otherwise, when you
put a form on a form on form, etc, references to the objects multiply.

This fixed http://crbug.com/117321

Committed: https://code.google.com/p/skia/source/detail?r=3360

[reed1, 2012-03-09 22:12:21]

don't know enough of PDF at the high level to comment on the recursive-or-not
nature of the change, but the code looks clean.

lgtm

[Steve VanDeBogart, 2012-03-09 22:16:13]

On 2012/03/09 22:12:21, reed1 wrote:
> don't know enough of PDF at the high level to comment on the recursive-or-not
> nature of the change, but the code looks clean.

addResourcesToCatalog in SkPDFDocument is uniqueifying the list of resources
anyway, so this shouldn't change which objects are actually sent to the output
file.  It just reduces the duplicates in the list before that process.
 
> lgtm

Thanks