Remove windows/mac/ios specific code from //ui

ui/events/platform/platform_event_builder.cc

 // Copyright 2015 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 "ui/events/platform/platform_event_builder.h"
 
 #if defined(USE_X11)
 #include <X11/extensions/XInput2.h>
 #include <X11/Xlib.h>
 #include <X11/keysym.h>
@@ skipping 226 matching lines @@
   key_event->set_code(CodeFromNative(native_event));
   key_event->set_is_char(IsCharFromNative(native_event));
   key_event->set_platform_keycode(PlatformKeycodeFromNative(native_event));
 
   if (IsRepeated(native_event, *key_event))
     key_event->set_flags(key_event->flags() | ui::EF_IS_REPEAT);
 
 #if defined(USE_X11)
   key_event->NormalizeFlags();
 #endif
-#if defined(OS_WIN)
-  // Only Windows has native character events.
-  if (key_event->is_char())
-    key_event->set_character(native_event.wParam);
-#endif
 }
 
 // static
 void PlatformEventBuilder::FillScrollEventFrom(
     const base::NativeEvent& native_event,
     ScrollEvent* scroll_event) {
   float x_offset = 0;
   float y_offset = 0;
   float x_offset_ordinal = 0;
   float y_offset_ordinal = 0;
@@ skipping 11 matching lines @@
                  &y_offset_ordinal, NULL);
     scroll_event->set_offset(x_offset, y_offset);
     scroll_event->set_offset_ordinal(x_offset_ordinal, y_offset_ordinal);
   } else {
     NOTREACHED() << "Unexpected event type " << scroll_event->type()
                  << " when constructing a ScrollEvent.";
   }
 }
 
 }  // namespace ui