Introduce WebInputMethodController to blink

third_party/WebKit/LayoutTests/fast/events/composition-event-source-device-event-sender.html

Index: third_party/WebKit/LayoutTests/fast/events/composition-event-source-device-event-sender.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/composition-event-source-device-event-sender.html b/third_party/WebKit/LayoutTests/fast/events/composition-event-source-device-event-sender.html
index f56b59e1d4b201af2bbb1d848c73e3a571bac72f..b8ce4ff8732d96e0dd946fba5afbcdf07f4e3a1b 100644
--- a/third_party/WebKit/LayoutTests/fast/events/composition-event-source-device-event-sender.html
+++ b/third_party/WebKit/LayoutTests/fast/events/composition-event-source-device-event-sender.html
@@ -14,12 +14,20 @@ if (window.eventSender) {
     for (var evt of ['compositionstart', 'compositionupdate', 'compositionend']) {
         document.addEventListener(evt, compositionHandler);
     }
-    
+
     var input = document.getElementById('input');
     input.focus();
 
+    // We need to force a text input update here so that later the call to
+    // RenderWidget::resetInputMethod() will lead to finishComposingText().
+    // Normally this would not be needed if the focus was due to user gesture.
+    // But on Mac, even with user gesture, we wait for the next compositing
+    // to update text input state frame. That is why we are explicitly calling
+    // this method here.
+    textInputController.forceTextInputStateUpdate();
+
     textInputController.setMarkedText('abcde', 1, 3);
-    
+
     input.blur();
 } else {
    debug('This test requires eventSender.');