Upgrade Blink to milliseconds-based last modified filetimes, part 3.

With WebFileInfo now recording modification time in milliseconds via
modificationTimeMS, switch FileMetadata over to using it and keep a
milliseconds-based modification time field also. Also have the fileapi's
File object's snapshot times be milliseconds-based.

To make it clearer what units the modification time values are over,
append a MS suffix. This is temporary until the conversion is complete.

This patch is the third one in the following series,

1: [blink] add WebFileInfo::modificationTimeMS [ https://codereview.chromium.org/873723004/ ]
2: [chromium] fill in modificationTimeMS [ https://codereview.chromium.org/884413002/ ] 
3: [blink] *this one* [ https://codereview.chromium.org/884393002/ ]
4: [chromium] set modificationTime to something msec-based [ https://codereview.chromium.org/862203003/ ]
5: [blink] switch to using modificationTime instead of *MS [ https://codereview.chromium.org/882343002/ ]
6: [chromium] stop setting modificationTimeMS [ https://codereview.chromium.org/890523002/ ]
7: [blink] remove modificationTimeMS [ https://codereview.chromium.org/869613005/ ]

R=mkwst,jsbell
BUG=451747

Review URL: https://codereview.chromium.org/884393002

git-svn-id: svn://svn.chromium.org/blink/trunk@189475 bbb929c8-8fbe-4397-9dbb-9b2b20218538
17 files changed
tree: 44aefd6765c881b72c6b7e798051c8b5c4e8ff17
  1. third_party/