Replace ViewHostMsg_TextInputState_Params with content::TextInputState.

content/renderer/render_widget.cc

 // Copyright (c) 2012 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 "content/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1040 matching lines @@
   // shown.
   if (show_ime == ShowIme::IF_NEEDED ||
       (IsUsingImeThread() && change_source == ChangeSource::FROM_IME) ||
       (text_input_type_ != new_type || text_input_mode_ != new_mode ||
        text_input_info_ != new_info ||
        can_compose_inline_ != new_can_compose_inline)
 #if defined(OS_ANDROID)
       || text_field_is_dirty_
 #endif
       ) {
-    ViewHostMsg_TextInputState_Params params;
+    TextInputState params;

[kenrb, 2016/04/26 15:54:19]

I think this is pulling the definition through the include of view_messages.h.
You should also #include text_input_state.h here (because IWYU).

[EhsanK, 2016/04/26 18:02:47]

Acknowledged.

     params.type = new_type;
     params.mode = new_mode;
     params.flags = new_info.flags;
     params.value = new_info.value.utf8();
     params.selection_start = new_info.selectionStart;
     params.selection_end = new_info.selectionEnd;
     params.composition_start = new_info.compositionStart;
     params.composition_end = new_info.compositionEnd;
     params.can_compose_inline = new_can_compose_inline;
     params.show_ime_if_needed = (show_ime == ShowIme::IF_NEEDED);
@@ skipping 1038 matching lines @@
 }
 
 float RenderWidget::GetOriginalDeviceScaleFactor() const {
   return
       screen_metrics_emulator_ ?
       screen_metrics_emulator_->original_screen_info().deviceScaleFactor :
       device_scale_factor_;
 }
 
 }  // namespace content