Add chrome side webusb permission UI code

chrome/browser/usb/usb_tab_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_USB_USB_TAB_HELPER_H_
 #define CHROME_BROWSER_USB_USB_TAB_HELPER_H_
 
 #include "base/containers/scoped_ptr_map.h"
 #include "base/macros.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
 
 namespace device {
 namespace usb {
 class DeviceManager;
 class PermissionProvider;
 }
 }
 
-class WebUSBPermissionProvider;
+namespace webusb {
+class WebUsbPermissionBubble;
+}
+
+struct FrameUsbServices;
 
 // Per-tab owner of USB services provided to render frames within that tab.
 class UsbTabHelper : public content::WebContentsObserver,
                      public content::WebContentsUserData<UsbTabHelper> {
  public:
   static UsbTabHelper* GetOrCreateForWebContents(
       content::WebContents* web_contents);
 
   ~UsbTabHelper() override;
 
   void CreateDeviceManager(
       content::RenderFrameHost* render_frame_host,
       mojo::InterfaceRequest<device::usb::DeviceManager> request);
 
+  void CreatePermissionBubble(
+      content::RenderFrameHost* render_frame_host,
+      mojo::InterfaceRequest<webusb::WebUsbPermissionBubble> request);
+
  private:
   explicit UsbTabHelper(content::WebContents* web_contents);
   friend class content::WebContentsUserData<UsbTabHelper>;
 
   // content::WebContentsObserver overrides:
   void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) override;
 
   void GetPermissionProvider(
       content::RenderFrameHost* render_frame_host,
       mojo::InterfaceRequest<device::usb::PermissionProvider> request);
 
-  base::ScopedPtrMap<content::RenderFrameHost*,
-                     scoped_ptr<WebUSBPermissionProvider>> permission_provider_;
+  void GetPermissionBubble(
+      content::RenderFrameHost* render_frame_host,
+      mojo::InterfaceRequest<webusb::WebUsbPermissionBubble> request);
+
+  base::ScopedPtrMap<content::RenderFrameHost*, scoped_ptr<FrameUsbServices>>
+      frame_usb_services_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbTabHelper);
 };
 
 #endif  // CHROME_BROWSER_USB_USB_TAB_HELPER_H_