Let Chrome app handle Ash accelerators first if the app is launched as a window

ash/accelerators/accelerator_controller_unittest.cc

Index: ash/accelerators/accelerator_controller_unittest.cc
diff --git a/ash/accelerators/accelerator_controller_unittest.cc b/ash/accelerators/accelerator_controller_unittest.cc
index 22d1465b6a06e99bdbc4269aca894f5f545ae338..6b955f27e3c5a13ac3c57fece69160b03c56d9a8 100644
--- a/ash/accelerators/accelerator_controller_unittest.cc
+++ b/ash/accelerators/accelerator_controller_unittest.cc
@@ -363,6 +363,17 @@ TEST_F(AcceleratorControllerTest, Process) {
   EXPECT_FALSE(GetController()->Process(accelerator_b));
 }
 
+TEST_F(AcceleratorControllerTest, IsRegistered) {
+  const ui::Accelerator accelerator_a(ui::VKEY_A, false, false, false);
+  const ui::Accelerator accelerator_shift_a(ui::VKEY_A, true, false, false);
+  TestTarget target;
+  GetController()->Register(accelerator_a, &target);
+  EXPECT_TRUE(GetController()->IsRegistered(accelerator_a));
+  EXPECT_FALSE(GetController()->IsRegistered(accelerator_shift_a));
+  GetController()->UnregisterAll(&target);
+  EXPECT_FALSE(GetController()->IsRegistered(accelerator_a));
+}
+
 #if defined(OS_WIN) || defined(USE_X11)
 TEST_F(AcceleratorControllerTest, ProcessOnce) {
   ui::Accelerator accelerator_a(ui::VKEY_A, false, false, false);