Create platform/mojo and move MojoHelper.h there

third_party/WebKit/Source/modules/webusb/USBDevice.cpp

 // 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 "modules/webusb/USBDevice.h"
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ToV8.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/webusb/USBConfiguration.h"
 #include "modules/webusb/USBControlTransferParameters.h"
 #include "modules/webusb/USBInTransferResult.h"
 #include "modules/webusb/USBIsochronousInTransferResult.h"
 #include "modules/webusb/USBIsochronousOutTransferResult.h"
 #include "modules/webusb/USBOutTransferResult.h"
-#include "platform/MojoHelper.h"
+#include "platform/mojo/MojoHelper.h"
 #include "wtf/Assertions.h"
 
 namespace usb = device::usb::wtf;
 
 namespace blink {
 
 namespace {
 
 const char kDeviceStateChangeInProgress[] = "An operation that changes the device state is in progress.";
 const char kDeviceUnavailable[] = "Device unavailable.";
@@ skipping 760 matching lines @@
     if (!isActive(resolver))
         return;
 
     if (success)
         resolver->resolve();
     else
         resolver->reject(DOMException::create(NetworkError, "Unable to reset the device."));
 }
 
 } // namespace blink