ash: Remap Command on Apple keyboards to Control [2/2]

This is yusukes's http://codereview.chromium.org/9854025/
with my review comments applied.

chrome/browser/chromeos/xinput_hierarchy_changed_event_listener.cc:

* Every time when a new device is added, notify the name of
  the device to KeyRewriter.
* Listens to XI_KeyPress and XI_KeyRelease events to the X
  root window, and notify the device ID of the event to
  KeyRewriter so that the rewriter could know the source of
  the next KeyPress/KeyRelease Core event.

Note that it's not possible to monitor both XI_KeyPress and
core KeyPress events for a single X window. For example, if
we monitor XI_KeyPress events in aura::RootWindowHostLinux
(by calling XISelectEvents() for the root Aura window,
xwindow_), it becomes impossible to receive KeyPress core
events for |xwindow_| in RootWindowHostLinux. It's also
impossible to convert XI_KeyPress into core KeyPress. That
is the reason why xinput_hierarchy_changed_event_listener.cc
is used to monitor XI_KeyPress/Release events.

chrome/browser/ui/views/ash/key_rewriter.cc:

* Rewrites Command key press on an Apple keyboard to Control
  key press, regardless of the user preference for remapping
  modifier keys.

Part 1 of 2 (Ash part): http://codereview.chromium.org/9838010/

BUG=121012
TEST=manual
TBR=sky

Review URL: http://codereview.chromium.org/9963027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@130037 0039d316-1c4b-4281-b951-d872f2087c98

0 files changed, 0 insertions, 0 deletions