Revert of Make File-Picker modal on Linux

Revert of Make File-Picker modal on Linux (patchset #18 id:340001 of https://codereview.chromium.org/1233913009/ )

Reason for revert:
Breaks input events in some cases (crbug.com/579408)

Original issue's description:
> Make File-Picker modal on Linux
>
> Chromium for Linux opens a Gtk file-picker for file browsing, but it is not
> modal because there is no GtkWindow as parent of file-picker.
>
> This patch allows the X11 host window to disable input event handling to make
> a file-picker modal
>
> The original CL was reverted due to wrong DCHECK with modal_dialog_xid_:
> https://codereview.chromium.org/1243503002
>
> BUG=408481
> TEST=BrowserSelectFileDialogTest, ModalTest
>
> Committed: https://crrev.com/3bc35de4ff086027d50519c9fb40122f27eb82f4
> Cr-Commit-Position: refs/heads/master@{#360961}

TBR=erg@chromium.org,juncai@chromium.org,msw@chromium.org,sky@chromium.org,joone.hur@intel.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=408481
Committed: https://crrev.com/0bf45553ab62cc5c97ee24bcdfbba9a0526235ea
Cr-Commit-Position: refs/heads/master@{#370570}

[sadrul, 2016-01-20 22:39:26]

Created Revert of Make File-Picker modal on Linux

[commit-bot: I haz the power, 2016-01-20 22:41:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1594973009/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1594973009/1

[commit-bot: I haz the power, 2016-01-20 22:46:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-01-20 22:46:18]

Try jobs failed on following builders:
  linux_chromium_compile_dbg_32_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  ios_dbg_simulator_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)

[sadrul, 2016-01-20 23:18:10]

The CQ bit was checked by sadrul@chromium.org

[commit-bot: I haz the power, 2016-01-20 23:20:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1594973009/140001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1594973009/140001

[commit-bot: I haz the power, 2016-01-21 02:19:19]

Committed patchset #2 (id:140001)

[commit-bot: I haz the power, 2016-01-21 02:20:40]

Description was changed from

==========
Revert of Make File-Picker modal on Linux (patchset #18 id:340001 of
https://codereview.chromium.org/1233913009/ )

Reason for revert:
Breaks input events in some cases (crbug.com/579408)

Original issue's description:
> Make File-Picker modal on Linux
> 
> Chromium for Linux opens a Gtk file-picker for file browsing, but it is not
> modal because there is no GtkWindow as parent of file-picker.
> 
> This patch allows the X11 host window to disable input event handling to make
> a file-picker modal
> 
> The original CL was reverted due to wrong DCHECK with modal_dialog_xid_:
> https://codereview.chromium.org/1243503002
> 
> BUG=408481
> TEST=BrowserSelectFileDialogTest, ModalTest
> 
> Committed: https://crrev.com/3bc35de4ff086027d50519c9fb40122f27eb82f4
> Cr-Commit-Position: refs/heads/master@{#360961}

TBR=erg@chromium.org,juncai@chromium.org,msw@chromium.org,sky@chromium.org,jo...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=408481
==========

to

==========
Revert of Make File-Picker modal on Linux (patchset #18 id:340001 of
https://codereview.chromium.org/1233913009/ )

Reason for revert:
Breaks input events in some cases (crbug.com/579408)

Original issue's description:
> Make File-Picker modal on Linux
>
> Chromium for Linux opens a Gtk file-picker for file browsing, but it is not
> modal because there is no GtkWindow as parent of file-picker.
>
> This patch allows the X11 host window to disable input event handling to make
> a file-picker modal
>
> The original CL was reverted due to wrong DCHECK with modal_dialog_xid_:
> https://codereview.chromium.org/1243503002
>
> BUG=408481
> TEST=BrowserSelectFileDialogTest, ModalTest
>
> Committed: https://crrev.com/3bc35de4ff086027d50519c9fb40122f27eb82f4
> Cr-Commit-Position: refs/heads/master@{#360961}

TBR=erg@chromium.org,juncai@chromium.org,msw@chromium.org,sky@chromium.org,jo...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=408481

Committed: https://crrev.com/0bf45553ab62cc5c97ee24bcdfbba9a0526235ea
Cr-Commit-Position: refs/heads/master@{#370570}
==========

[commit-bot: I haz the power, 2016-01-21 02:20:41]

Patchset 2 (id:??) landed as
https://crrev.com/0bf45553ab62cc5c97ee24bcdfbba9a0526235ea
Cr-Commit-Position: refs/heads/master@{#370570}