Move FileEnumerator to its own file, do some refactoring.

It creates a class FileInfo to contain the details rather than using a platform-specific typedef. This allows the accessors GetName, GetSize, etc. to be moved directly to this class (previously they were static helpers on the FileEnumerator class) which makes a bunch of code much cleaner. It also gives reasonable getting and initialization which the previous version lacked.

BUG=175002

Reland of 198820 and 298824
Original review = https://codereview.chromium.org/13165005
[email protected]

Review URL: https://codereview.chromium.org/16392011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205019 0039d316-1c4b-4281-b951-d872f2087c98
110 files changed