Confirm ongoing IME composition at the right render widget in response to mouse click/tap.

content/browser/renderer_host/render_widget_host_view_aura_unittest.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/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <tuple>
@@ skipping 4198 matching lines @@
   base::Closure ime_call =
       base::Bind(&ui::TextInputClient::InsertText,
                  base::Unretained(text_input_client()), base::string16());
   for (auto index : active_view_sequence_) {
     ActivateViewForTextInputManager(views_[index], ui::TEXT_INPUT_TYPE_TEXT);
     EXPECT_TRUE(!!RunAndReturnIPCSent(ime_call, processes_[index],
                                       InputMsg_ImeConfirmComposition::ID));
   }
 }
 
+// This test makes a specific child frame's view active and then forces the tab
+// view end current IME composition session by sending out an IME confirm

[Charlie Reis, 2016/06/30 18:43:12]

nit: I think a word is missing here?
"force the tab view end current"

[EhsanK, 2016/06/30 19:26:29]

Acknowledged.

+// composition IPC. The test then verifies that the message is sent to the
+// active widget's process.
+TEST_F(InputMethodResultAuraTest, FinishImeCompositionSession) {
+  base::Closure ime_finish_session_call =
+      base::Bind(&RenderWidgetHostViewAura::FinishImeCompositionSession,
+                 base::Unretained(tab_view()));
+  for (auto index : active_view_sequence_) {
+    ActivateViewForTextInputManager(views_[index], ui::TEXT_INPUT_TYPE_TEXT);
+    SetHasCompositionTextToTrue();
+    EXPECT_TRUE(!!RunAndReturnIPCSent(ime_finish_session_call,
+                                      processes_[index],
+                                      InputMsg_ImeConfirmComposition::ID));
+  }
+}
+
 }  // namespace content