Part 3 of Move SelectFileDialog implementation to ui/base/dialogs/

Part 3 of Move SelectFileDialog implementation to ui/base/dialogs/

- Actually move the SelectFileDialog class to ui::, leaving a compatibility header in the interim.
- Because of linking reasons, create a factory interface for the SelectFileDialogExtension to use to inject itself from chrome/browser/views/ui/
- Because of linking reasons, move SelectFileDialogWin in this patch.
- wstring code moved to win only files.


BUG=134529
TEST=none
First Review URL: https://chromiumcodereview.appspot.com/10695066

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=147263

[Elliot Glaysher, 2012-07-17 22:53:12]

A part of this patch was previously committed and then reverted. Due to how
windows linking works, I have to move all code that is linked in windows in this
patch. (It used to be much smaller.)

[sky, 2012-07-17 23:30:28]

LGTM

[commit-bot: I haz the power, 2012-07-17 23:31:26]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/erg@chromium.org/10698168/14004

[commit-bot: I haz the power, 2012-07-17 23:31:41]

Presubmit check for 10698168-14004 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit Warnings **
New code should not use wstrings.  If you are calling an API that accepts a
wstring, fix the API.
    ui/base/dialogs/select_file_dialog_win.cc:816
    ui/base/dialogs/select_file_dialog_win.cc:817
    ui/base/dialogs/select_file_dialog_win.cc:818
    ui/base/dialogs/select_file_dialog_win.cc:819
    ui/base/dialogs/select_file_dialog_win.cc:821
    ui/base/dialogs/select_file_dialog_win.cc:828
    ui/base/dialogs/select_file_dialog_win.cc:830
    ui/base/dialogs/select_file_dialog_win.h:16
    ui/base/dialogs/select_file_dialog_win.h:17
    ui/base/dialogs/select_file_dialog_win.h:18
    ui/base/dialogs/select_file_dialog_win.h:19

Presubmit checks took 1.9s to calculate.