[Chromecast] Reuse the Aura window manager across receiver apps.

chromecast/graphics/BUILD.gn

 # Copyright 2015 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("//chromecast/chromecast.gni")
 import("//build/config/ui.gni")
 
 source_set("graphics") {
   sources = [
     "cast_vsync_settings.cc",
     "cast_vsync_settings.h",
+    "cast_window_manager.h",
   ]
 
   deps = [
     "//base",
+    "//ui/gfx",
   ]
 
+  if (use_aura && !is_cast_audio_only) {
+    sources += [
+      "cast_window_manager_aura.cc",
+      "cast_window_manager_aura.h",
+    ]
+
+    deps += [ "//ui/base/ime" ]
+  } else {
+    sources += [
+      "cast_window_manager_default.cc",
+      "cast_window_manager_default.h",
+    ]
+  }
+
   if (use_aura) {
     sources += [
       "cast_screen.cc",
       "cast_screen.h",
     ]
 
     deps += [
       ":libcast_graphics_1.0",
       "//chromecast/public",
       "//ui/aura",
       "//ui/display",
-      "//ui/gfx",
       "//ui/gfx/geometry",
     ]
   }
 }
 
 shared_library("libcast_graphics_1.0") {
   sources = [
     "cast_egl_platform_default.cc",
     "graphics_properties_default.cc",
     "osd_plane_default.cc",
   ]
 
   public_deps = [
     "//chromecast/public",
   ]
 
   deps = [
     "//base",
     "//chromecast/base:chromecast_switches",
     "//chromecast/base:init_shlib",
   ]
 }