Support search as a sticky key.

ash/sticky_keys/sticky_keys_controller.cc

Index: ash/sticky_keys/sticky_keys_controller.cc
diff --git a/ash/sticky_keys/sticky_keys_controller.cc b/ash/sticky_keys/sticky_keys_controller.cc
index 6237004f1f417f1a8793a8c0859bf0e486e69500..779b1404aa725c4bcca1f71188abebee2d3ff5e0 100644
--- a/ash/sticky_keys/sticky_keys_controller.cc
+++ b/ash/sticky_keys/sticky_keys_controller.cc
@@ -66,6 +66,7 @@ void StickyKeysController::Enable(bool enabled) {
       altgr_sticky_key_.reset(new StickyKeysHandler(ui::EF_ALTGR_DOWN));
       ctrl_sticky_key_.reset(new StickyKeysHandler(ui::EF_CONTROL_DOWN));
       mod3_sticky_key_.reset(new StickyKeysHandler(ui::EF_MOD3_DOWN));
+      search_sticky_key_.reset(new StickyKeysHandler(ui::EF_COMMAND_DOWN));
 
       overlay_.reset(new StickyKeysOverlay());
       overlay_->SetModifierVisible(ui::EF_ALTGR_DOWN, altgr_enabled_);
@@ -99,6 +100,8 @@ bool StickyKeysController::HandleKeyEvent(const ui::KeyEvent& event,
          ctrl_sticky_key_->HandleKeyEvent(
              event, key_code, mod_down_flags, released) ||
          mod3_sticky_key_->HandleKeyEvent(
+             event, key_code, mod_down_flags, released) ||
+         search_sticky_key_->HandleKeyEvent(
              event, key_code, mod_down_flags, released);
 }
 
@@ -177,7 +180,8 @@ ui::EventRewriteStatus StickyKeysController::NextDispatchEvent(
                   alt_sticky_key_->GetModifierUpEvent(new_event) +
                   altgr_sticky_key_->GetModifierUpEvent(new_event) +
                   ctrl_sticky_key_->GetModifierUpEvent(new_event) +
-                  mod3_sticky_key_->GetModifierUpEvent(new_event);
+                  mod3_sticky_key_->GetModifierUpEvent(new_event) +
+                  search_sticky_key_->GetModifierUpEvent(new_event);
   if (!new_event)
     return ui::EVENT_REWRITE_CONTINUE;
   if (remaining)
@@ -333,6 +337,8 @@ StickyKeysHandler::KeyEventType StickyKeysHandler::TranslateKeyEvent(
     is_target_key = (modifier_flag_ == ui::EF_ALTGR_DOWN);
   } else if (key_code == ui::VKEY_OEM_8) {
     is_target_key = (modifier_flag_ == ui::EF_MOD3_DOWN);
+  } else if (key_code == ui::VKEY_LWIN) {
+    is_target_key = (modifier_flag_ == ui::EF_COMMAND_DOWN);
   } else {
     return type == ui::ET_KEY_PRESSED ?
         NORMAL_KEY_DOWN : NORMAL_KEY_UP;