MacViews: Implement capture using NSEvent local+global monitors

ui/views/widget/native_widget_mac.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/widget/native_widget_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 191 matching lines @@
   NOTIMPLEMENTED();
   return NULL;
 }
 
 TooltipManager* NativeWidgetMac::GetTooltipManager() const {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 void NativeWidgetMac::SetCapture() {
-  NOTIMPLEMENTED();
+  if (bridge_ && !bridge_->HasCapture())
+    bridge_->AcquireCapture();
 }
 
 void NativeWidgetMac::ReleaseCapture() {
-  NOTIMPLEMENTED();
+  if (bridge_)
+    bridge_->ReleaseCapture();
 }
 
 bool NativeWidgetMac::HasCapture() const {
-  NOTIMPLEMENTED();
-  return false;
+  return bridge_ && bridge_->HasCapture();
 }
 
 InputMethod* NativeWidgetMac::CreateInputMethod() {
   return bridge_ ? bridge_->CreateInputMethod() : NULL;
 }
 
 internal::InputMethodDelegate* NativeWidgetMac::GetInputMethodDelegate() {
   return bridge_.get();
 }
 
@@ skipping 407 matching lines @@
 }
 
 // static
 gfx::FontList NativeWidgetPrivate::GetWindowTitleFontList() {
   NOTIMPLEMENTED();
   return gfx::FontList();
 }
 
 }  // namespace internal
 }  // namespace views