MacViews: Implement text input.

ui/views/cocoa/bridged_native_widget.h

Index: ui/views/cocoa/bridged_native_widget.h
diff --git a/ui/views/cocoa/bridged_native_widget.h b/ui/views/cocoa/bridged_native_widget.h
index f034799bbf4357011c6dfff8846b1e2b0d93369d..9f8da5d648c45f41173fd9fe3ab50c242ac96870 100644
--- a/ui/views/cocoa/bridged_native_widget.h
+++ b/ui/views/cocoa/bridged_native_widget.h
@@ -9,6 +9,7 @@
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
+#import "ui/views/focus/focus_manager.h"
 #include "ui/views/ime/input_method_delegate.h"
 #include "ui/views/views_export.h"
 
@@ -28,7 +29,8 @@ class View;
 // A bridge to an NSWindow managed by an instance of NativeWidgetMac or
 // DesktopNativeWidgetMac. Serves as a helper class to bridge requests from the
 // NativeWidgetMac to the Cocoa window. Behaves a bit like an aura::Window.
-class VIEWS_EXPORT BridgedNativeWidget : public internal::InputMethodDelegate {
+class VIEWS_EXPORT BridgedNativeWidget : public internal::InputMethodDelegate,
+                                         public FocusChangeListener {
  public:
   // Creates one side of the bridge. |parent| can be NULL in tests.
   BridgedNativeWidget(NativeWidgetMac* parent);
@@ -58,6 +60,14 @@ class VIEWS_EXPORT BridgedNativeWidget : public internal::InputMethodDelegate {
   base::scoped_nsobject<ViewsNSWindowDelegate> window_delegate_;
   base::scoped_nsobject<BridgedContentView> bridged_view_;
   scoped_ptr<ui::InputMethod> input_method_;
+  FocusManager* focus_manager_;  // Weak. Owned by our Widget.
+                                 // Will be NULL if native_widget_mac_ is NULL.
+
+  // Overridden from FocusChangeListener:
+  virtual void OnWillChangeFocus(View* focused_before,
+                                 View* focused_now) OVERRIDE;
+  virtual void OnDidChangeFocus(View* focused_before,
+                                View* focused_now) OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(BridgedNativeWidget);
 };