Support F3 and F4 keys on an Apple keyboard.

ash/accelerators/accelerator_table.cc

Index: ash/accelerators/accelerator_table.cc
diff --git a/ash/accelerators/accelerator_table.cc b/ash/accelerators/accelerator_table.cc
index ba89019f556e0a69f92d7926ca30b9d0f0271152..83a19a5b8c490eee397e38afc0adca96b87c459d 100644
--- a/ash/accelerators/accelerator_table.cc
+++ b/ash/accelerators/accelerator_table.cc
@@ -42,6 +42,7 @@ const AcceleratorData kAcceleratorData[] = {
   { true, ui::VKEY_TAB, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN,
     CYCLE_BACKWARD_MRU },
   { true, ui::VKEY_F5, ui::EF_NONE, CYCLE_FORWARD_LINEAR },
+  { true, ui::VKEY_MEDIA_LAUNCH_APP1, ui::EF_NONE, CYCLE_FORWARD_LINEAR },
 #if defined(OS_CHROMEOS)
   { true, ui::VKEY_BRIGHTNESS_DOWN, ui::EF_NONE, BRIGHTNESS_DOWN },
   { true, ui::VKEY_BRIGHTNESS_UP, ui::EF_NONE, BRIGHTNESS_UP },
@@ -65,6 +66,8 @@ const AcceleratorData kAcceleratorData[] = {
   { true, ui::VKEY_T, ui::EF_CONTROL_DOWN, NEW_TAB },
 
   { true, ui::VKEY_F5, ui::EF_SHIFT_DOWN, CYCLE_BACKWARD_LINEAR },
+  { true, ui::VKEY_MEDIA_LAUNCH_APP1, ui::EF_SHIFT_DOWN,
+    CYCLE_BACKWARD_LINEAR },
   { true, ui::VKEY_T, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, RESTORE_TAB },
   { true, ui::VKEY_F5, ui::EF_CONTROL_DOWN, TAKE_SCREENSHOT },
   { true, ui::VKEY_F5, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
@@ -72,6 +75,7 @@ const AcceleratorData kAcceleratorData[] = {
   { true, ui::VKEY_PRINT, ui::EF_NONE, TAKE_SCREENSHOT },
   // On Chrome OS, Search key is mapped to LWIN.
   { true, ui::VKEY_LWIN, ui::EF_NONE, TOGGLE_APP_LIST },
+  { true, ui::VKEY_MEDIA_LAUNCH_APP2, ui::EF_NONE, TOGGLE_APP_LIST },
   { true, ui::VKEY_BROWSER_SEARCH, ui::EF_NONE, TOGGLE_APP_LIST },
   { true, ui::VKEY_LWIN, ui::EF_SHIFT_DOWN, TOGGLE_CAPS_LOCK },
   { true, ui::VKEY_F6, ui::EF_NONE, BRIGHTNESS_DOWN },