Replace ViewHostMsg_TextInputState_Params with content::TextInputState.

content/common/text_input_state.h

+// 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.
+
+#ifndef CONTENT_COMMON_TEXT_INPUT_STATE_H_
+#define CONTENT_COMMON_TEXT_INPUT_STATE_H_
+
+#include <string>
+
+#include "content/common/content_export.h"
+#include "ui/base/ime/text_input_mode.h"
+#include "ui/base/ime/text_input_type.h"
+
+namespace content {
+
+// The text input state information for handling IME on the browser side. The
+// text input state information such as type, mode, etc. are used by the input
+// method to handle IME (the usage is specific to each platform).
+// This struct is also used in TextInputManager to track
+// text input state information on the browser side.

[Charlie Reis, 2016/04/26 06:13:23]

nit: This last sentence seems redundant with the first.  We can probably drop
it.

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

Done.

+struct CONTENT_EXPORT TextInputState {
+  TextInputState();
+  TextInputState(const TextInputState& other);
+
+  // Type of the input field.
+  ui::TextInputType type;
+
+  // The mode of input field.
+  ui::TextInputMode mode;
+
+  // The flags of input field (autocorrect, autocomplete, etc.)
+  int flags;
+
+  // The value of input field.
+  std::string value;
+
+  // The cursor position of the current selection start, or the caret position
+  // if nothing is selected.
+  int selection_start;
+
+  // The cursor position of the current selection end, or the caret position if
+  // nothing is selected.
+  int selection_end;
+
+  // The start position of the current composition, or -1 if there is none.
+  int composition_start;
+
+  // The end position of the current composition, or -1 if there is none.
+  int composition_end;
+
+  // Whether or not inline composition can be performed for the current input.
+  bool can_compose_inline;
+
+  // Whether or not the IME should be shown as a result of this update. Even if
+  // true, the IME will only be shown if the input is appropriate (e.g. not
+  // TEXT_INPUT_TYPE_NONE).
+  bool show_ime_if_needed;
+
+  // Whether this change is originated from non-IME (e.g., Javascript,
+  // Autofill).
+  bool is_non_ime_change;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_TEXT_INPUT_STATE_H_