Run clang-modernize -use-nullptr over src/extensions/.

extensions/browser/api/usb/usb_api.cc

Index: extensions/browser/api/usb/usb_api.cc
diff --git a/extensions/browser/api/usb/usb_api.cc b/extensions/browser/api/usb/usb_api.cc
index c5e35aad892d681dd65709f5bf2f8ed6cb519723..3810ad352c06c4881970d644a1eff2ba96555744 100644
--- a/extensions/browser/api/usb/usb_api.cc
+++ b/extensions/browser/api/usb/usb_api.cc
@@ -188,7 +188,7 @@ scoped_refptr<net::IOBuffer> CreateBufferForTransfer(
     UsbEndpointDirection direction,
     size_t size) {
   if (size >= kMaxTransferLength)
-    return NULL;
+    return nullptr;
 
   // Allocate a |size|-bytes buffer, or a one-byte buffer if |size| is 0. This
   // is due to an impedance mismatch between IOBuffer and URBs. An IOBuffer
@@ -205,7 +205,7 @@ scoped_refptr<net::IOBuffer> CreateBufferForTransfer(
     }
   }
   NOTREACHED();
-  return NULL;
+  return nullptr;
 }
 
 const char* ConvertTransferStatusToApi(const UsbTransferStatus status) {
@@ -423,7 +423,7 @@ void ConvertConfigDescriptor(const UsbConfigDescriptor& input,
 
 namespace extensions {
 
-UsbAsyncApiFunction::UsbAsyncApiFunction() : manager_(NULL) {
+UsbAsyncApiFunction::UsbAsyncApiFunction() : manager_(nullptr) {
 }
 
 UsbAsyncApiFunction::~UsbAsyncApiFunction() {
@@ -432,7 +432,7 @@ UsbAsyncApiFunction::~UsbAsyncApiFunction() {
 bool UsbAsyncApiFunction::PrePrepare() {
   manager_ = ApiResourceManager<UsbDeviceResource>::Get(browser_context());
   set_work_thread_id(BrowserThread::FILE);
-  return manager_ != NULL;
+  return manager_ != nullptr;
 }
 
 bool UsbAsyncApiFunction::Respond() {
@@ -473,20 +473,20 @@ scoped_refptr<UsbDevice> UsbAsyncApiFunction::GetDeviceOrCompleteWithError(
   UsbService* service = device::DeviceClient::Get()->GetUsbService();
   if (!service) {
     CompleteWithError(kErrorInitService);
-    return NULL;
+    return nullptr;
   }
 
   scoped_refptr<UsbDevice> device = service->GetDeviceById(input_device.device);
   if (!device.get()) {
     CompleteWithError(kErrorNoDevice);
-    return NULL;
+    return nullptr;
   }
 
   if (!HasDevicePermission(device)) {
     // Must act as if there is no such a device.
     // Otherwise can be used to finger print unauthorized devices.
     CompleteWithError(kErrorNoDevice);
-    return NULL;
+    return nullptr;
   }
 
   return device;
@@ -499,13 +499,13 @@ UsbAsyncApiFunction::GetDeviceHandleOrCompleteWithError(
       manager_->Get(extension_->id(), input_device_handle.handle);
   if (!resource) {
     CompleteWithError(kErrorNoDevice);
-    return NULL;
+    return nullptr;
   }
 
   if (!resource->device().get() || !resource->device()->GetDevice().get()) {
     CompleteWithError(kErrorDisconnect);
     manager_->Remove(extension_->id(), input_device_handle.handle);
-    return NULL;
+    return nullptr;
   }
 
   if (resource->device()->GetDevice()->vendor_id() !=
@@ -513,7 +513,7 @@ UsbAsyncApiFunction::GetDeviceHandleOrCompleteWithError(
       resource->device()->GetDevice()->product_id() !=
           input_device_handle.product_id) {
     CompleteWithError(kErrorNoDevice);
-    return NULL;
+    return nullptr;
   }
 
   return resource->device();