cros: Allow default app order to be loaded from an external file.

chrome/common/chrome_paths.cc

Index: chrome/common/chrome_paths.cc
diff --git a/chrome/common/chrome_paths.cc b/chrome/common/chrome_paths.cc
index c06c24d9c4d0c29b7d5a1f11e9a1feeab0554982..79867cd50f8013a54c0a3307f1523e4e9fd4fbf9 100644
--- a/chrome/common/chrome_paths.cc
+++ b/chrome/common/chrome_paths.cc
@@ -92,6 +92,15 @@ const char kFilepathSinglePrefExtensions[] =
 #endif  // defined(GOOGLE_CHROME_BUILD)
 #endif  // defined(OS_LINUX)
 
+#if defined(OS_CHROMEOS)
+const char kDefaultAppOrderFileName[] =
+#if defined(GOOGLE_CHROME_BUILD)
+    FILE_PATH_LITERAL("/usr/share/google-chrome/default_app_order.json");
+#else
+    FILE_PATH_LITERAL("/usr/share/chromium/default_app_order.json");
+#endif  // defined(GOOGLE_CHROME_BUILD)
+#endif  // defined(OS_CHROMEOS)
+
 }  // namespace
 
 namespace chrome {
@@ -367,6 +376,9 @@ bool PathProvider(int key, FilePath* result) {
         return false;
       cur = cur.Append(FILE_PATH_LITERAL("wallpapers"));
       break;
+    case chrome::FILE_DEFAULT_APP_ORDER:
+      cur = FilePath(FILE_PATH_LITERAL(kDefaultAppOrderFileName));
+      break;
 #endif
     // The following are only valid in the development environment, and
     // will fail if executed from an installed executable (because the