Showing virtual keyboard when input type changed

components/arc/common/ime.mojom

 // 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.
 
 module arc.mojom;
 
 // Represents the type of text input field currently focused.
 [Extensible]
 enum TextInputType {
   NONE,
@@ skipping 20 matching lines @@
 // Represents a single segment of text currently composed by IME.
 struct CompositionSegment {
   // Start offset of the segment in UTF-16 index.
   uint32 start_offset;
   // End offset of the segment in UTF-16 index.
   uint32 end_offset;
   // Indicates that this segment should be emphasized.
   bool emphasized;
 };
 
+// Next MinVersion: 3
 interface ImeHost {
   // Notifies Chrome that the text input focus is changed.
   OnTextInputTypeChanged(TextInputType type);
 
   // Notifies Chrome that the cursor poisition has changed.
   OnCursorRectChanged(CursorRect rect);
 
   // Notifies Chrome that the current composition is canceled.
   [MinVersion=1] OnCancelComposition();
+
+  // Show virtual keyboard of Chrome OS if needed.
+  [MinVersion=2] ShowImeIfNeeded();
 };
 
 interface ImeInstance {
   Init(ImeHost host_ptr);
 
   // Sets composition text and attributes requested by the host IME.
   SetCompositionText(string text, array<CompositionSegment> segments);
 
   // Commits the last set composition text and clears the composition.
   ConfirmCompositionText();
 
   // Commits the specified text and clears the composition.
   InsertText(string text);
 };