Add --disable-webusb-security flag for testing existing devices.

chrome/browser/ui/startup/bad_flags_prompt.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/startup/bad_flags_prompt.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
@@ skipping 75 matching lines @@
     // This flag allows people to whitelist certain origins as secure, even
     // if they are not.
     switches::kUnsafelyTreatInsecureOriginAsSecure,
 
     // This flag enables Web Bluetooth. Since the UI for Web Bluetooth is
     // not yet implemented, websites could take control over paired devices
     // without the users knowledge, so we need to show a warning for when
     // the flag is enabled.
     switches::kEnableWebBluetooth,
 
+    // This flag disables WebUSB's CORS-like checks for origin to device
+    // communication, allowing any origin to ask the user for permission to
+    // connect to a device. It is intended for manufacturers testing their
+    // existing devices until https://crbug.com/598766 is implemented.
+    switches::kDisableWebUsbSecurity,
+
     NULL
   };
 
   for (const char** flag = kBadFlags; *flag; ++flag) {
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(*flag)) {
       SimpleAlertInfoBarDelegate::Create(
           InfoBarService::FromWebContents(web_contents),
           infobars::InfoBarDelegate::BAD_FLAGS_PROMPT,
           infobars::InfoBarDelegate::kNoIconID,
           gfx::VectorIconId::VECTOR_ICON_NONE,
@@ skipping 32 matching lines @@
                                  user_data_dir.LossyDisplayName());
 
   if (cleanup_resource_bundle)
     ResourceBundle::CleanupSharedInstance();
 
   // More complex dialogs cannot be shown before the earliest calls here.
   ShowWarningMessageBox(NULL, title, message);
 }
 
 }  // namespace chrome