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 ed07ae2f0c8d00120f266e57163f5a3d7152298d..7464bfa87854772029cf2fbed5e73528290555e4 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -789,6 +789,10 @@ 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,
@@ -1030,11 +1034,19 @@ 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);
 }