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

Index: content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
index 995e81c034aa87c7212a4a2e62e9283b92f1b7db..61b0efcca394852aef6f92d0858dda4ea0a9b84f 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
@@ -4216,4 +4216,21 @@ TEST_F(InputMethodResultAuraTest, InsertText) {
   }
 }
 
+// This test makes a specific child frame's view active and then forces the
+// tab's view end the current IME composition session by sending out an IME
+// IPC to confirm composition. 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