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

chromecast/graphics/BUILD.gn

Index: chromecast/graphics/BUILD.gn
diff --git a/chromecast/graphics/BUILD.gn b/chromecast/graphics/BUILD.gn
index 435b1a02910fb5a369cbba5e7e7b9a42441cfa90..8fd33dec9203adfcc394098c7b62ea87ee276afc 100644
--- a/chromecast/graphics/BUILD.gn
+++ b/chromecast/graphics/BUILD.gn
@@ -9,12 +9,28 @@ 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",
@@ -26,7 +42,6 @@ source_set("graphics") {
       "//chromecast/public",
       "//ui/aura",
       "//ui/display",
-      "//ui/gfx",
       "//ui/gfx/geometry",
     ]
   }