Switch CdmWrapper to use uint32_t for size types per style guide.

BUG=none
TEST=compiles

Review URL: https://codereview.chromium.org/26592003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230385 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed