Desktop Aura: Allow tab drags out of window.

You can now drag tabs in and out of windows in linux_aura builds. This patch has a lot of moving parts and caveats though.

Moving parts in the patch:
- Added system location to aura::Events.
- Forwarding move events from RootWindowHostLinux to the TabDragController through an observer.
- MessagePumpAuraX11 now can block waiting for a window to be mapped. If we don't do this, we can't perform a grab on the new window.
- The drag offset is threaded from TabDragController through the WindowMoveController interface. (There's no other non-racey way of getting this data locally from X.)
- RootWindowHostLinux now has working Show()/Hide().

TODOs:
- After releasing a new window, the window looks focused, but isn't. You have to click on it for it to receive input focus.

BUG=133059
TEST=none

Review URL: https://chromiumcodereview.appspot.com/10828133

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152180 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 2 insertions, 2 deletions

diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index 5c57283..2b9d3d1 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -457,8 +457,8 @@ void Widget::SetVisibilityChangedAnimationsEnabled(bool value) {
   native_widget_->SetVisibilityChangedAnimationsEnabled(value);
 }
 
-Widget::MoveLoopResult Widget::RunMoveLoop() {
-  return native_widget_->RunMoveLoop();
+Widget::MoveLoopResult Widget::RunMoveLoop(const gfx::Point& drag_offset) {
+  return native_widget_->RunMoveLoop(drag_offset);
 }
 
 void Widget::EndMoveLoop() {