Add power-user keyboard mode for ChromeOS with Search key acting as a typical Fn key.

ash/accelerators/accelerator_controller_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/display/display_manager.h"
 #include "ash/ime_control_delegate.h"
 #include "ash/screenshot_delegate.h"
@@ skipping 613 matching lines @@
         ui::Accelerator(ui::VKEY_PRINT, ui::EF_NONE)));
     EXPECT_EQ(2, delegate->handle_take_screenshot_count());
     EXPECT_TRUE(ProcessWithContext(
         ui::Accelerator(ui::VKEY_F5, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN)));
     EXPECT_EQ(2, delegate->handle_take_screenshot_count());
   }
 #endif
   // ToggleAppList
   {
     EXPECT_FALSE(ash::Shell::GetInstance()->GetAppListTargetVisibility());
+    // Pressing the search key should do nothing, since the Search key can be
+    // used as a modifier for accessing extended keyboard shortcuts.
+    EXPECT_FALSE(ProcessWithContext(
+        ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
     EXPECT_TRUE(ProcessWithContext(
+        ReleaseAccelerator(ui::VKEY_LWIN, ui::EF_NONE)));
+    EXPECT_TRUE(ash::Shell::GetInstance()->GetAppListTargetVisibility());
+    EXPECT_FALSE(ProcessWithContext(
         ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
-    EXPECT_TRUE(ash::Shell::GetInstance()->GetAppListTargetVisibility());
     EXPECT_TRUE(ProcessWithContext(
-        ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
+        ReleaseAccelerator(ui::VKEY_LWIN, ui::EF_NONE)));
     EXPECT_FALSE(ash::Shell::GetInstance()->GetAppListTargetVisibility());
   }
   // ToggleAppList (with spoken feedback enabled)
   {
     ShellDelegate* delegate = ash::Shell::GetInstance()->delegate();
     delegate->ToggleSpokenFeedback();
     EXPECT_FALSE(ProcessWithContext(
         ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
+    EXPECT_FALSE(ProcessWithContext(
+        ReleaseAccelerator(ui::VKEY_LWIN, ui::EF_NONE)));
     delegate->ToggleSpokenFeedback();
+    EXPECT_FALSE(ProcessWithContext(
+        ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
     EXPECT_TRUE(ProcessWithContext(
-        ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
+        ReleaseAccelerator(ui::VKEY_LWIN, ui::EF_NONE)));
   }
   // DisableCapsLock
   {
     CapsLockDelegate* delegate = Shell::GetInstance()->caps_lock_delegate();
     delegate->SetCapsLockEnabled(true);
     EXPECT_TRUE(delegate->IsCapsLockEnabled());
     // Handled only on key release.
     EXPECT_FALSE(ProcessWithContext(
         ui::Accelerator(ui::VKEY_LSHIFT, ui::EF_NONE)));
     EXPECT_TRUE(delegate->IsCapsLockEnabled());
@@ skipping 604 matching lines @@
     EXPECT_EQ(f9, delegate->last_accelerator());
     EXPECT_EQ(0, delegate->handle_volume_up_count());
     EXPECT_TRUE(ProcessWithContext(f10));
     EXPECT_EQ(1, delegate->handle_volume_up_count());
     EXPECT_EQ(f10, delegate->last_accelerator());
   }
 }
 #endif
 
 }  // namespace ash