x11: Move X event handling out of the message-pump.

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
index 716fbb95b37d637f3d70eff880cad6863cd72b96..65ad99937c15296448f24f72a99924808f08167e 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
@@ -25,6 +25,8 @@
 #include "ui/base/hit_test.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/events/event_utils.h"
+#include "ui/events/platform/platform_event_source.h"
+#include "ui/events/platform/x11/x11_event_source.h"
 #include "ui/events/x/device_data_manager.h"
 #include "ui/events/x/device_list_cache_x.h"
 #include "ui/events/x/touch_factory_x11.h"
@@ -311,7 +313,8 @@ void DesktopWindowTreeHostX11::CloseNow() {
 
   open_windows().remove(xwindow_);
   // Actually free our native resources.
-  base::MessagePumpX11::Current()->RemoveDispatcherForWindow(xwindow_);
+  if (ui::PlatformEventSource::GetInstance())
+    ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
   XDestroyWindow(xdisplay_, xwindow_);
   xwindow_ = None;
 
@@ -974,7 +977,8 @@ void DesktopWindowTreeHostX11::InitX11Window(
       CopyFromParent,  // visual
       attribute_mask,
       &swa);
-  base::MessagePumpX11::Current()->AddDispatcherForWindow(this, xwindow_);
+  if (ui::PlatformEventSource::GetInstance())
+    ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
   open_windows().push_back(xwindow_);
 
   // TODO(erg): Maybe need to set a ViewProp here like in RWHL::RWHL().
@@ -1300,14 +1304,23 @@ void DesktopWindowTreeHostX11::MapWindow(ui::WindowShowState show_state) {
   // We now block until our window is mapped. Some X11 APIs will crash and
   // burn if passed |xwindow_| before the window is mapped, and XMapWindow is
   // asynchronous.
-  base::MessagePumpX11::Current()->BlockUntilWindowMapped(xwindow_);
+  if (ui::X11EventSource::GetInstance())
+    ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
   window_mapped_ = true;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// DesktopWindowTreeHostX11, MessagePumpDispatcher implementation:
+// DesktopWindowTreeHostX11, ui::PlatformEventDispatcher implementation:
 
-uint32_t DesktopWindowTreeHostX11::Dispatch(const base::NativeEvent& event) {
+bool DesktopWindowTreeHostX11::CanDispatchEvent(
+    const ui::PlatformEvent& event) {
+  return event->xany.window == xwindow_ ||
+         (event->type == GenericEvent &&
+          static_cast<XIDeviceEvent*>(event->xcookie.data)->event == xwindow_);
+}
+
+uint32_t DesktopWindowTreeHostX11::DispatchEvent(
+    const ui::PlatformEvent& event) {
   XEvent* xev = event;
 
   TRACE_EVENT1("views", "DesktopWindowTreeHostX11::Dispatch",
@@ -1597,7 +1610,7 @@ uint32_t DesktopWindowTreeHostX11::Dispatch(const base::NativeEvent& event) {
       break;
     }
   }
-  return POST_DISPATCH_NONE;
+  return ui::POST_DISPATCH_STOP_PROPAGATION;
 }
 
 ////////////////////////////////////////////////////////////////////////////////