Revert of Support Compat mode inside of the desktop tree.

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 446819c16215c1bb6ffaedbf25583d4f1ad61a4a..93ddb01fa9d3581d4af479107ab747eed41d2915 100644
--- a/ash/accelerators/accelerator_table.cc
+++ b/ash/accelerators/accelerator_table.cc
@@ -171,6 +171,11 @@
   { true, ui::VKEY_U, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN | ui::EF_SHIFT_DOWN,
     PRINT_UI_HIERARCHIES },
 
+  { false, ui::VKEY_HOME, ui::EF_SHIFT_DOWN, ACCESSIBLE_FOCUS_PREVIOUS},
+  { false, ui::VKEY_PRIOR, ui::EF_SHIFT_DOWN, ACCESSIBLE_FOCUS_PREVIOUS},
+  { false, ui::VKEY_END, ui::EF_SHIFT_DOWN, ACCESSIBLE_FOCUS_NEXT},
+  { false, ui::VKEY_NEXT, ui::EF_SHIFT_DOWN, ACCESSIBLE_FOCUS_NEXT},
+
   // TODO(yusukes): Handle VKEY_MEDIA_STOP, and
   // VKEY_MEDIA_LAUNCH_MAIL.
 };
@@ -403,6 +408,8 @@
     arraysize(kActionsAllowedInAppMode);
 
 const AcceleratorAction kActionsNeedingWindow[] = {
+    ACCESSIBLE_FOCUS_NEXT,
+    ACCESSIBLE_FOCUS_PREVIOUS,
     CYCLE_BACKWARD_MRU,
     CYCLE_FORWARD_MRU,
     TOGGLE_OVERVIEW,