Bug Fix: Set USE_CRAS for //chrome and //chrome/ui

chrome/browser/ui/BUILD.gn

Index: chrome/browser/ui/BUILD.gn
diff --git a/chrome/browser/ui/BUILD.gn b/chrome/browser/ui/BUILD.gn
index 712c5fbfaa8e0f4b3c0bca6c59789438711ede60..45dc9e86e88a8a8cb7c239dcc518ceb046c735b6 100644
--- a/chrome/browser/ui/BUILD.gn
+++ b/chrome/browser/ui/BUILD.gn
@@ -7,6 +7,7 @@ import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
+import("//media/media_options.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("../../chrome_browser_ui.gypi") ],
@@ -148,6 +149,10 @@ split_static_library("ui") {
     deps += [ "//extensions/browser" ]
   }
 
+  if (is_chromeos && use_cras) {
+    defines += [ "USE_CRAS" ]
+  }
+
   if (!is_ios) {
     sources += rebase_path(gypi_values.chrome_browser_ui_non_ios_sources,
                            ".",