Fixes crashing in RequestUsbDevicesAccess

chrome/browser/usb/usb_device.cc

 // Copyright 2013 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/usb_device.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
 #include "chrome/browser/usb/usb_context.h"
 #include "chrome/browser/usb/usb_device_handle.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/libusb/src/libusb/libusb.h"
 
 #if defined(OS_CHROMEOS)
 #include "base/chromeos/chromeos_version.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/permission_broker_client.h"
 #endif  // defined(OS_CHROMEOS)
 
 using content::BrowserThread;
 
+namespace {
+
+void OnRequestUsbAccessReplied(
+    const base::Callback<void(bool success)>& callback,
+    bool success) {
+  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+                          base::Bind(callback, success));
+}
+
+}  // namespace
+
 UsbDevice::UsbDevice(
     scoped_refptr<UsbContext> context,
     PlatformUsbDevice platform_device,
     uint16 vendor_id,
     uint16 product_id,
     uint32 unique_id)
     : platform_device_(platform_device),
       vendor_id_(vendor_id),
       product_id_(product_id),
       unique_id_(unique_id),
@@ skipping 15 matching lines @@
   for (HandlesVector::iterator it = handles_.begin();
       it != handles_.end();
       ++it) {
     (*it)->InternalClose();
   }
   STLClearObject(&handles_);
   libusb_unref_device(platform_device_);
 }
 
 #if defined(OS_CHROMEOS)
+
 void UsbDevice::RequestUsbAcess(
     int interface_id,
     const base::Callback<void(bool success)>& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   // ChromeOS builds on non-ChromeOS machines (dev) should not attempt to
   // use permission broker.
   if (base::chromeos::IsRunningOnChromeOS()) {
     chromeos::PermissionBrokerClient* client =
         chromeos::DBusThreadManager::Get()->GetPermissionBrokerClient();
     DCHECK(client) << "Could not get permission broker client.";
     if (!client) {
       callback.Run(false);
       return;
     }
 
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&chromeos::PermissionBrokerClient::RequestUsbAccess,
                    base::Unretained(client),
                    this->vendor_id_,
                    this->product_id_,
                    interface_id,
-                   base::Bind(&UsbDevice::OnRequestUsbAccessReplied,
-                              base::Unretained(this),
-                              callback)));
+                   base::Bind(&OnRequestUsbAccessReplied, callback)));
   }
 }
 
-void UsbDevice::OnRequestUsbAccessReplied(
-    const base::Callback<void(bool success)>& callback,
-    bool success) {
-  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
-                          base::Bind(callback, success));
-}
-
 #endif
 
 scoped_refptr<UsbDeviceHandle> UsbDevice::Open() {
   DCHECK(thread_checker_.CalledOnValidThread());
   PlatformUsbDeviceHandle handle;
   int rv = libusb_open(platform_device_, &handle);
   if (LIBUSB_SUCCESS == rv) {
     scoped_refptr<UsbConfigDescriptor> interfaces = ListInterfaces();
     if (!interfaces)
       return NULL;
@@ skipping 36 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   HandlesVector handles;
   swap(handles, handles_);
   for (std::vector<scoped_refptr<UsbDeviceHandle> >::iterator it =
       handles.begin();
       it != handles.end();
       ++it) {
     (*it)->InternalClose();
   }
 }