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..3820b034d295cd91e8d73d8b8782b29870451ba9 100644
--- a/ash/accelerators/accelerator_controller_unittest.cc
+++ b/ash/accelerators/accelerator_controller_unittest.cc
@@ -349,6 +349,18 @@ TEST_F(AcceleratorControllerTest, UnregisterAll) {
   EXPECT_EQ(1, target2.accelerator_pressed_count());
 }
 
+TEST_F(AcceleratorControllerTest, IsAccelerator) {
+  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()->IsAccelerator(accelerator_a));
+  EXPECT_FALSE(GetController()->IsAccelerator(accelerator_shift_a));
+  GetController()->UnregisterAll(&target);
+  EXPECT_FALSE(GetController()->IsAccelerator(accelerator_a));
+}
+
 TEST_F(AcceleratorControllerTest, Process) {
   const ui::Accelerator accelerator_a(ui::VKEY_A, false, false, false);
   TestTarget target1;