Pass the filename obtained from content-disposition header for download

This CL adds another parameter (filename) for Android to get correct
filename to download. Rather than parsing the header again in Java side,
already-implemented native header parser is used.

BUG=257250

Review URL: https://codereview.chromium.org/152683003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249936 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed