Small fix for decompose_image_to_text.
Small fix for decompose_image_to_text.

This utility was using BasicBlockDecomposer without first checking a PETransformPolicy object, resulting in explosions.

BUG=
R=sebmarchand@chromium.org
TBR=sebmarchand@chromium.org

Review URL: https://codereview.appspot.com/49030045

git-svn-id: db59699583a60be9a535cd09cdc9132301867226@1983 15e8cca8-e42c-11de-a347-f34a4f72eb7d

ericmckean/syzygy,google/syzygy,pombreda/syzygy,Eloston/syzygy,wangming28/syzygy,ericmckean/syzygy,supriyantomaftuh/syzygy,sebmarchand/syzygy,google/syzygy,supriyantomaftuh/syzygy,Eloston/syzygy,ericmckean/syzygy,ericmckean/syzygy,ericmckean/syzygy,google/syzygy,google/syzygy,pombreda/syzygy,sebmarchand/syzygy,wangming28/syzygy,supriyantomaftuh/syzygy,wangming28/syzygy,supriyantomaftuh/syzygy,pombreda/syzygy,sebmarchand/syzygy,pombreda/syzygy,pombreda/syzygy,wangming28/syzygy,sebmarchand/syzygy,sebmarchand/syzygy