Merge to m48: Fix volume slider to emit value changed events and do not focus system tray it\

Fix volume slider to emit value changed events and do not focus system tray it em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system\
 tray item for transient views.

 SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The fo\
 rmer has some logic to detect when ChromeVox is on. If so, it tries to focus t\
 he first item. This is problematic because PopupDetailedView is transient and \
 disappears.

 The general bug is that ChromeVox gets the focus event and flips itself to com\
 -UU-:----F1  cl_descriptionbhyjBt   Top L1     (Fundamental) ------------------
 For information about GNU Emacs and the GNU system, type C-h C-a.


















 -UUU:----F1  *scratch*      All L1     (Fundamental) --------------------------
 Warning: Unknown defun property `special' in gfeeds-find

 # Enter a description of the change.
Fix volume slider to emit value changed events and do not focus system tray it\ em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system tray item for transient views.

SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The former has some logic to detect when ChromeVox is on. If so, it tries to focus the first item. This is problematic because PopupDetailedView is transient and disappears.

The general bug is that ChromeVox gets the focus event and flips itself to compat mode. However, true focus still lives in the web content.

BUG=559339
NOTRY=true
NOPRESUBMIT=true
TBR=

Review URL: https://codereview.chromium.org/1523953004

Cr-Commit-Position: refs/heads/master@{#365565}
(cherry picked from commit b6cac2bcff25657f70fcd69f414be4884675a443)

[David Tseng, 2016-01-11 19:31:15]

Description was changed from

==========
Fix volume slider to emit value changed events and do not focus system tray it\
\ em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system\
 tray item for transient views.

 SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The fo\
 rmer has some logic to detect when ChromeVox is on. If so, it tries to focus t\
 he first item. This is problematic because PopupDetailedView is transient and \
 disappears.

 The general bug is that ChromeVox gets the focus event and flips itself to com\
 -UU-:----F1  cl_descriptionbhyjBt   Top L1     (Fundamental) ------------------
 For information about GNU Emacs and the GNU system, type C-h C-a.


















 -UUU:----F1  *scratch*      All L1     (Fundamental) --------------------------
 Warning: Unknown defun property `special' in gfeeds-find

 # Enter a description of the change.
Fix volume slider to emit value changed events and do not focus system tray it\
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system
tray item for transient views.

SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The
former has some logic to detect when ChromeVox is on. If so, it tries to focus
the first item. This is problematic because PopupDetailedView is transient and
disappears.

The general bug is that ChromeVox gets the focus event and flips itself to
compat mode. However, true focus still lives in the web content.

BUG=559339

Review URL: https://codereview.chromium.org/1523953004

Cr-Commit-Position: refs/heads/master@{#365565}
(cherry picked from commit b6cac2bcff25657f70fcd69f414be4884675a443)
==========

to

==========
Fix volume slider to emit value changed events and do not focus system tray it
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system\
 tray item for transient views.

 SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The fo\
 rmer has some logic to detect when ChromeVox is on. If so, it tries to focus t\
 he first item. This is problematic because PopupDetailedView is transient and \
 disappears.

 The general bug is that ChromeVox gets the focus event and flips itself to com\
 -UU-:----F1  cl_descriptionbhyjBt   Top L1     (Fundamental) ------------------
 For information about GNU Emacs and the GNU system, type C-h C-a.


















 -UUU:----F1  *scratch*      All L1     (Fundamental) --------------------------
 Warning: Unknown defun property `special' in gfeeds-find

 # Enter a description of the change.
Fix volume slider to emit value changed events and do not focus system tray it\
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system
tray item for transient views.

SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The
former has some logic to detect when ChromeVox is on. If so, it tries to focus
the first item. This is problematic because PopupDetailedView is transient and
disappears.

The general bug is that ChromeVox gets the focus event and flips itself to
compat mode. However, true focus still lives in the web content.

BUG=559339
NOTRY=true
NOPRESUBMIT=true
TBR=

Review URL: https://codereview.chromium.org/1523953004

Cr-Commit-Position: refs/heads/master@{#365565}
(cherry picked from commit b6cac2bcff25657f70fcd69f414be4884675a443)
==========

[David Tseng, 2016-01-11 19:31:24]

The CQ bit was checked by dtseng@chromium.org

[commit-bot: I haz the power, 2016-01-11 19:33:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1577973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1577973002/1

[commit-bot: I haz the power, 2016-01-11 19:39:53]

Description was changed from

==========
Fix volume slider to emit value changed events and do not focus system tray it
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system\
 tray item for transient views.

 SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The fo\
 rmer has some logic to detect when ChromeVox is on. If so, it tries to focus t\
 he first item. This is problematic because PopupDetailedView is transient and \
 disappears.

 The general bug is that ChromeVox gets the focus event and flips itself to com\
 -UU-:----F1  cl_descriptionbhyjBt   Top L1     (Fundamental) ------------------
 For information about GNU Emacs and the GNU system, type C-h C-a.


















 -UUU:----F1  *scratch*      All L1     (Fundamental) --------------------------
 Warning: Unknown defun property `special' in gfeeds-find

 # Enter a description of the change.
Fix volume slider to emit value changed events and do not focus system tray it\
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system
tray item for transient views.

SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The
former has some logic to detect when ChromeVox is on. If so, it tries to focus
the first item. This is problematic because PopupDetailedView is transient and
disappears.

The general bug is that ChromeVox gets the focus event and flips itself to
compat mode. However, true focus still lives in the web content.

BUG=559339
NOTRY=true
NOPRESUBMIT=true
TBR=

Review URL: https://codereview.chromium.org/1523953004

Cr-Commit-Position: refs/heads/master@{#365565}
(cherry picked from commit b6cac2bcff25657f70fcd69f414be4884675a443)
==========

to

==========
Fix volume slider to emit value changed events and do not focus system tray it
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system\
 tray item for transient views.

 SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The fo\
 rmer has some logic to detect when ChromeVox is on. If so, it tries to focus t\
 he first item. This is problematic because PopupDetailedView is transient and \
 disappears.

 The general bug is that ChromeVox gets the focus event and flips itself to com\
 -UU-:----F1  cl_descriptionbhyjBt   Top L1     (Fundamental) ------------------
 For information about GNU Emacs and the GNU system, type C-h C-a.


















 -UUU:----F1  *scratch*      All L1     (Fundamental) --------------------------
 Warning: Unknown defun property `special' in gfeeds-find

 # Enter a description of the change.
Fix volume slider to emit value changed events and do not focus system tray it\
em for transient views.

SystemTray::ShowItems gets called by
SystemTrayItem::PopupDetailedView. The fo\
rmer has some logic to detect when ChromeVox is on. If so, it tries to
focus t\Fix volume slider to emit value changed events and do not focus system
tray item for transient views.

SystemTray::ShowItems gets called by SystemTrayItem::PopupDetailedView. The
former has some logic to detect when ChromeVox is on. If so, it tries to focus
the first item. This is problematic because PopupDetailedView is transient and
disappears.

The general bug is that ChromeVox gets the focus event and flips itself to
compat mode. However, true focus still lives in the web content.

BUG=559339
NOTRY=true
NOPRESUBMIT=true
TBR=

Review URL: https://codereview.chromium.org/1523953004

Cr-Commit-Position: refs/heads/master@{#365565}
(cherry picked from commit b6cac2bcff25657f70fcd69f414be4884675a443)
==========

[commit-bot: I haz the power, 2016-01-11 19:39:53]

Committed patchset #1 (id:1)