Add webusb notification UI code

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 756c066b29dd158d66466ef1d2dc3d1b8d18ca6d..b031671869fa08603330da1efa7f06a8aa68d316 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -111,6 +111,12 @@
 #include "components/gcm_driver/gcm_client_factory.h"
 #endif
 
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+#include "chrome/browser/chrome_webusb_browser_client.h"
+#include "components/webusb/webusb_browser_client.h"
+#include "components/webusb/webusb_detector.h"
+#endif
+
 #if defined(ENABLE_BACKGROUND)
 #include "chrome/browser/background/background_mode_manager.h"
 #endif
@@ -225,6 +231,11 @@ BrowserProcessImpl::BrowserProcessImpl(
 
   update_client::UpdateQueryParams::SetDelegate(
       ChromeUpdateQueryParamsDelegate::GetInstance());
+
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+  webusb_browser_client_.reset(new ChromeWebUsbBrowserClient());
+  webusb::WebUsbBrowserClient::Set(webusb_browser_client_.get());
+#endif
 }
 
 BrowserProcessImpl::~BrowserProcessImpl() {