Remove context menus.

sky/engine/platform/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 import("//sky/engine/build/scripts/scripts.gni")
 import("//sky/engine/config.gni")
 
 # Most targets in this file are private actions so use that as the default.
 visibility = [":*"]
@@ skipping 97 matching lines @@
 
   output_name = "sky_platform"
 
   sources = [
     "CalculationValue.h",
     "CheckedInt.h",
     "Clock.cpp",
     "Clock.h",
     "ContentType.cpp",
     "ContentType.h",
-    "ContextMenu.cpp",
-    "ContextMenu.h",
-    "ContextMenuItem.cpp",
-    "ContextMenuItem.h",
     "Cursor.cpp",
     "Cursor.h",
     "DateComponents.cpp",
     "DateComponents.h",
     "Decimal.cpp",
     "Decimal.h",
     "EventDispatchForbiddenScope.h",
     "EventTracer.cpp",
     "EventTracer.h",
     "FloatConversion.h",
@@ skipping 762 matching lines @@
     #'cflags': ['-marm'],
     #    'conditions': [
     #      ['OS=="android"', {
     #        'cflags!': ['-mthumb'],
     #      }],
     #    ],
 
     deps = [ ":sky_common" ]
   }
 }