Add infrastructure for a USB device blocklist.

chrome/browser/usb/web_usb_permission_provider.cc

 // Copyright 2015 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/usb/web_usb_permission_provider.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/usb/usb_blocklist.h"
 #include "chrome/browser/usb/usb_chooser_context.h"
 #include "chrome/browser/usb/usb_chooser_context_factory.h"
 #include "chrome/browser/usb/usb_tab_helper.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "device/usb/usb_device.h"
 #include "device/usb/webusb_descriptors.h"
 
@@ skipping 29 matching lines @@
   return false;
 }
 
 }  // namespace
 
 // static
 bool WebUSBPermissionProvider::HasDevicePermission(
     content::RenderFrameHost* render_frame_host,
     scoped_refptr<const device::UsbDevice> device) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  if (UsbBlocklist::Get().IsExcluded(device))
+    return false;
+
   WebContents* web_contents =
       WebContents::FromRenderFrameHost(render_frame_host);
   GURL embedding_origin =
       web_contents->GetMainFrame()->GetLastCommittedURL().GetOrigin();
   GURL requesting_origin = render_frame_host->GetLastCommittedURL().GetOrigin();
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   UsbChooserContext* chooser_context =
       UsbChooserContextFactory::GetForProfile(profile);
 
@@ skipping 61 matching lines @@
   tab_helper->IncrementConnectionCount(render_frame_host_);
 }
 
 void WebUSBPermissionProvider::DecrementConnectionCount() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   WebContents* web_contents =
       WebContents::FromRenderFrameHost(render_frame_host_);
   UsbTabHelper* tab_helper = UsbTabHelper::FromWebContents(web_contents);
   tab_helper->DecrementConnectionCount(render_frame_host_);
 }