Revert of Do not activate TrayBubbleView by default

ash/system/ime_menu/ime_menu_tray.cc

Index: ash/system/ime_menu/ime_menu_tray.cc
diff --git a/ash/system/ime_menu/ime_menu_tray.cc b/ash/system/ime_menu/ime_menu_tray.cc
index 280652b1d65c03c6479fc2c1f1e6572d3dd38cf8..ce3f458f9e8fd241931578d48fd4062d831366bf 100644
--- a/ash/system/ime_menu/ime_menu_tray.cc
+++ b/ash/system/ime_menu/ime_menu_tray.cc
@@ -4,7 +4,6 @@
 
 #include "ash/system/ime_menu/ime_menu_tray.h"
 
-#include "ash/accelerators/accelerator_controller.h"
 #include "ash/accessibility_delegate.h"
 #include "ash/ash_constants.h"
 #include "ash/ime/ime_controller.h"
@@ -299,7 +298,7 @@
 
 ImeMenuTray::~ImeMenuTray() {
   if (bubble_)
-    bubble_->bubble_view()->ResetDelegate();
+    bubble_->bubble_view()->reset_delegate();
   SystemTrayNotifier* tray_notifier = Shell::Get()->system_tray_notifier();
   tray_notifier->RemoveIMEObserver(this);
   tray_notifier->RemoveVirtualKeyboardObserver(this);
@@ -330,6 +329,7 @@
   init_params.anchor_alignment = GetAnchorAlignment();
   init_params.min_width = kTrayMenuMinimumWidth;
   init_params.max_width = kTrayMenuMinimumWidth;
+  init_params.can_activate = true;
   init_params.close_on_deactivate = true;
 
   views::TrayBubbleView* bubble_view = new views::TrayBubbleView(init_params);
@@ -468,24 +468,8 @@
 
 void ImeMenuTray::OnMouseExitedView() {}
 
-void ImeMenuTray::RegisterAccelerators(
-    const std::vector<ui::Accelerator>& accelerators,
-    views::TrayBubbleView* tray_bubble_view) {
-  Shell::Get()->accelerator_controller()->Register(accelerators,
-                                                   tray_bubble_view);
-}
-
-void ImeMenuTray::UnregisterAllAccelerators(
-    views::TrayBubbleView* tray_bubble_view) {
-  Shell::Get()->accelerator_controller()->UnregisterAll(tray_bubble_view);
-}
-
 base::string16 ImeMenuTray::GetAccessibleNameForBubble() {
   return l10n_util::GetStringUTF16(IDS_ASH_IME_MENU_ACCESSIBLE_NAME);
-}
-
-bool ImeMenuTray::ShouldEnableExtraKeyboardAccessibility() {
-  return Shell::Get()->accessibility_delegate()->IsSpokenFeedbackEnabled();
 }
 
 void ImeMenuTray::HideBubble(const views::TrayBubbleView* bubble_view) {