Add more out of line copy ctors for complex classes.

chrome/browser/ui/input_method/input_method_engine_base.cc

 // Copyright 2016 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 "chrome/browser/ui/input_method/input_method_engine_base.h"
 
 #undef FocusIn
 #undef FocusOut
 #undef RootWindow
 #include <algorithm>
@@ skipping 130 matching lines @@
 #else
   ext_event->key = ui::KeycodeConverter::DomKeyToKeyString(event.GetDomKey());
 #endif  // defined(OS_CHROMEOS)
 }
 
 }  // namespace
 
 InputMethodEngineBase::KeyboardEvent::KeyboardEvent()
     : alt_key(false), ctrl_key(false), shift_key(false), caps_lock(false) {}
 
+InputMethodEngineBase::KeyboardEvent::KeyboardEvent(
+    const KeyboardEvent& other) = default;
+
 InputMethodEngineBase::KeyboardEvent::~KeyboardEvent() {}
 
 InputMethodEngineBase::InputMethodEngineBase()
     : current_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       context_id_(0),
       next_context_id_(1),
       composition_text_(new ui::CompositionText()),
       composition_cursor_(0),
       sent_key_event_(nullptr),
       profile_(nullptr),
@@ skipping 286 matching lines @@
         ui::EventTimeForNow());
     base::AutoReset<const ui::KeyEvent*> reset_sent_key(&sent_key_event_,
                                                         &ui_event);
     if (!SendKeyEvent(&ui_event, event.code))
       return false;
   }
   return true;
 }
 
 }  // namespace input_method