Remove --echo-ext-path flag

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index 99129d8cb5d6462731be9853019ede3c714dc399..dd42862d51f82eadf6abfc67f17efe632038ef4d 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -509,13 +509,8 @@ void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
     }
 #endif  // defined(GOOGLE_CHROME_BUILD)
 
-    base::FilePath echo_extension_path(FILE_PATH_LITERAL(
-        "/usr/share/chromeos-assets/echo"));
-    if (command_line->HasSwitch(chromeos::switches::kEchoExtensionPath)) {
-      echo_extension_path = command_line->GetSwitchValuePath(
-          chromeos::switches::kEchoExtensionPath);
-    }
-    Add(IDR_ECHO_MANIFEST, echo_extension_path);
+    Add(IDR_ECHO_MANIFEST,
+        base::FilePath(FILE_PATH_LITERAL("/usr/share/chromeos-assets/echo")));
 
     if (!command_line->HasSwitch(chromeos::switches::kGuestSession)) {
       Add(IDR_WALLPAPERMANAGER_MANIFEST,