Remove "API proposal for chrome.app.window to intercept all keys."

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm

 // Copyright 2013 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 "chrome/browser/ui/cocoa/apps/native_app_window_cocoa.h"
 
 #include "base/command_line.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 850 matching lines @@
 }
 
 void NativeAppWindowCocoa::SetAlwaysOnTop(bool always_on_top) {
   gfx::SetNSWindowAlwaysOnTop(window(), always_on_top);
 }
 
 void NativeAppWindowCocoa::SetVisibleOnAllWorkspaces(bool always_visible) {
   gfx::SetNSWindowVisibleOnAllWorkspaces(window(), always_visible);
 }
 
-void NativeAppWindowCocoa::SetInterceptAllKeys(bool want_all_key) {
-  // TODO(sriramsr): implement for OSX (http://crbug.com/166928).
-  NOTIMPLEMENTED();
-}
-
 NativeAppWindowCocoa::~NativeAppWindowCocoa() {
 }
 
 AppNSWindow* NativeAppWindowCocoa::window() const {
   NSWindow* window = [window_controller_ window];
   CHECK(!window || [window isKindOfClass:[AppNSWindow class]]);
   return static_cast<AppNSWindow*>(window);
 }
 
 content::WebContents* NativeAppWindowCocoa::WebContents() const {
   return app_window_->web_contents();
 }
 
 void NativeAppWindowCocoa::UpdateRestoredBounds() {
   if (IsRestored(*this))
     restored_bounds_ = [window() frame];
 }
 
 void NativeAppWindowCocoa::HideWithoutMarkingHidden() {
   [window() orderOut:window_controller_];
 }