Implement RenderWidgetHostViewBase::ImeCancelComposition for all Views (Aura Only)

content/browser/renderer_host/text_input_manager.cc

Index: content/browser/renderer_host/text_input_manager.cc
diff --git a/content/browser/renderer_host/text_input_manager.cc b/content/browser/renderer_host/text_input_manager.cc
index c80f3807a0452485b0435e9e3c5f2b024c7dcb05..b41efbece02118baaf9b835c32f43a28ee3407c1 100644
--- a/content/browser/renderer_host/text_input_manager.cc
+++ b/content/browser/renderer_host/text_input_manager.cc
@@ -78,6 +78,12 @@ void TextInputManager::UpdateTextInputState(
   NotifyObserversAboutInputStateUpdate(view, changed);
 }
 
+void TextInputManager::ImeCancelComposition(RenderWidgetHostViewBase* view) {
+  DCHECK(IsRegistered(view));
+  FOR_EACH_OBSERVER(Observer, observer_list_,
+                    OnImeCancelComposition(this, view));
+}
+
 void TextInputManager::Register(RenderWidgetHostViewBase* view) {
   DCHECK(!IsRegistered(view));