Adds capture to the mojo window_manager.

services/window_manager/focus_controller.cc

Index: services/window_manager/focus_controller.cc
diff --git a/services/window_manager/focus_controller.cc b/services/window_manager/focus_controller.cc
index ba6454acc66f6d2b0ee047713b9b701e42a9ef44..e316f5603284ffc22617d58135972a617f75f999 100644
--- a/services/window_manager/focus_controller.cc
+++ b/services/window_manager/focus_controller.cc
@@ -7,6 +7,7 @@
 #include "base/auto_reset.h"
 #include "mojo/services/view_manager/public/cpp/view_property.h"
 #include "mojo/services/view_manager/public/cpp/view_tracker.h"
+#include "services/window_manager/capture_controller.h"
 #include "services/window_manager/focus_controller_observer.h"
 #include "services/window_manager/focus_rules.h"
 #include "services/window_manager/view_target.h"
@@ -74,8 +75,10 @@ void FocusController::FocusView(View* view) {
     return;
   }
 
-  // TODO(erg): We need to early abort in the of a view having
-  // capture. However, we currently don't have a capture client here.
+  // We should not be messing with the focus if the window has capture, unless
+  // no view has focus.
+  if (view && (GetCaptureView(view) == view) && focused_view_)

[sky, 2014/12/16 03:44:20]

This was was recently nuked from chrome:
https://codereview.chromium.org/753223004/diff/60001/ui/wm/core/focus_control...
.

+    return;
 
   // Focusing a window also activates its containing activatable window. Note
   // that the rules could redirect activation activation and/or focus.