Redesigns the text input focus handling.

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index 2bc65f079e388de2d550154a4f2912de0a7f4ee2..8af7ed37ee59f7fa3c5650e42272849c638dc828 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -788,6 +788,10 @@ const InputMethod* Widget::GetInputMethod() const {
   }
 }
 
+ui::InputMethod* Widget::GetHostInputMethod() {
+  return native_widget_private()->GetHostInputMethod();
+}
+
 void Widget::RunShellDrag(View* view,
                           const ui::OSExchangeData& data,
                           const gfx::Point& location,
@@ -1029,11 +1033,19 @@ void Widget::OnNativeWidgetActivationChanged(bool active) {
 }
 
 void Widget::OnNativeFocus(gfx::NativeView old_focused_view) {
+  // Ensure the focused view's TextInputClient is used for text input.
+  views::FocusManager* focus_manager = GetFocusManager();
+  focus_manager->FocusTextInputClient(focus_manager->GetFocusedView());
+
   WidgetFocusManager::GetInstance()->OnWidgetFocusEvent(old_focused_view,
                                                         GetNativeView());
 }
 
 void Widget::OnNativeBlur(gfx::NativeView new_focused_view) {
+  // Ensure the focused view's TextInputClient is not used for text input.
+  views::FocusManager* focus_manager = GetFocusManager();
+  focus_manager->BlurTextInputClient(focus_manager->GetFocusedView());
+
   WidgetFocusManager::GetInstance()->OnWidgetFocusEvent(GetNativeView(),
                                                         new_focused_view);
 }