chromeos: Tighten DEPS on //ash in //chrome/browser to support mash

chrome/browser/DEPS

 include_rules = [
   "+apps",
-  "+ash",
   "+cc/paint",
   "+chrome/app",
   "+chrome/chrome_watcher",
   "+chrome/grit",
   "+chrome/install_static",
   "+chrome/installer/util",
   "+chrome_elf/blacklist",
   "+chrome_elf/chrome_elf_constants.h",
   "+chrome_elf/dll_hash",
   "+chromeos",
@@ skipping 40 matching lines @@
   "+services/resource_coordinator/public/cpp",
   "+services/resource_coordinator/public/interfaces/memory_instrumentation",
   "+services/service_manager",
   "+services/shape_detection/public/interfaces",
   "+services/ui/public",
   "+skia/ext",
   "+third_party/boringssl/src/include",
   "+third_party/crashpad",
   "+third_party/cros_system_api",
 
+  # Code under //ash runs out-of-process under mustash (chrome --mash) so it
+  # must be accessed via mojo interfaces in //ash/public/interfaces. See
+  # //ash/README.md.
+  "-ash",
+  "+ash/public",
+  "+ash/ash_switches.h",
+
   # chrome only needs switches from cc. All usage of the compositor is from
   # content. Definitely don't include generic stuff from cc/base here, if this
   # is needed these files need to move to base/
   "+cc/base/switches.h",
 
   # Unsafe to use from //chrome, see http://goo.gl/QQG5wo
   "-content/public/test/test_browser_context.h",
 
   "+storage/browser",
   "+storage/common",
 
   "-chrome/browser/ui/views",
   "+chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h",
   "+chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.h",
   "+chrome/browser/ui/views/extensions/request_file_system_dialog_view.h",
   "+chrome/browser/ui/views/try_chrome_dialog_view.h",
   "+chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h",
 
-  # Code in chrome should not use ash::SessionStateDelegate and friends.
-  # Instead, use SessionManager/UserManager/SessionControllerClient directly
-  # since they are part of chrome.
-  "-ash/session",
-
   # Explicitly disallow using SyncMessageFilter to prevent browser from
   # sending synchronous IPC messages on non-UI threads.
   "-ipc/ipc_sync_message_filter.h",
 
   # Other libraries.
   "+libxml",
   "+third_party/google_toolbox_for_mac/src",
   "+third_party/icu/source/common/unicode",
   "+third_party/icu/source/i18n/unicode",
   "+third_party/leveldatabase",
@@ skipping 31 matching lines @@
   "+third_party/WebKit/public/platform/modules/webshare/webshare.mojom.h",
   "+third_party/WebKit/public/platform/site_engagement.mojom.h",
   "+third_party/WebKit/public/public_features.h",
   "+third_party/WebKit/public/web/WebContextMenuData.h",
   "+third_party/WebKit/public/web/WebFindOptions.h",
   "+third_party/WebKit/public/web/WebMediaPlayerAction.h",
   "+third_party/WebKit/public/web/WebPluginAction.h",
   "+third_party/WebKit/public/web/WebTextDirection.h",
   "+third_party/WebKit/public/web/window_features.mojom.h",
 ]
+specific_include_rules = {
+  # TODO(mash): Remove. http://crbug.com/678705
+  "fullscreen_chromeos\.cc": [
+    "+ash/root_window_controller.h",
+    "+ash/shell.h",
+  ]
+}