Convert HidDeviceInfo from a struct to a refcounted class.

device/hid/hid_connection.cc

 // Copyright (c) 2014 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 "device/hid/hid_connection.h"
 
 #include <algorithm>
 
 namespace device {
 
@@ skipping 20 matching lines @@
   const uint8_t report_id_;
 };
 
 // Functor returning true if collection has a protected usage.
 struct CollectionIsProtected {
   bool operator()(const HidCollectionInfo& info) const {
     return info.usage.IsProtected();
   }
 };
 
-bool FindCollectionByReportId(const HidDeviceInfo& device_info,
+bool FindCollectionByReportId(const std::vector<HidCollectionInfo>& collections,
                               uint8_t report_id,
                               HidCollectionInfo* collection_info) {
-  std::vector<HidCollectionInfo>::const_iterator collection_iter =
-      std::find_if(device_info.collections.begin(),
-                   device_info.collections.end(),
-                   CollectionHasReportId(report_id));
-  if (collection_iter != device_info.collections.end()) {
+  std::vector<HidCollectionInfo>::const_iterator collection_iter = std::find_if(
+      collections.begin(), collections.end(), CollectionHasReportId(report_id));
+  if (collection_iter != collections.end()) {
     if (collection_info) {
       *collection_info = *collection_iter;
     }
     return true;
   }
 
   return false;
 }
 
-bool HasProtectedCollection(const HidDeviceInfo& device_info) {
-  return std::find_if(device_info.collections.begin(),
-                      device_info.collections.end(),
-                      CollectionIsProtected()) != device_info.collections.end();
+bool HasProtectedCollection(const std::vector<HidCollectionInfo>& collections) {
+  return std::find_if(collections.begin(), collections.end(),
+                      CollectionIsProtected()) != collections.end();
 }
 
 }  // namespace
 
-HidConnection::HidConnection(const HidDeviceInfo& device_info)
+HidConnection::HidConnection(scoped_refptr<HidDeviceInfo> device_info)
     : device_info_(device_info), closed_(false) {
-  has_protected_collection_ = HasProtectedCollection(device_info);
+  has_protected_collection_ =
+      HasProtectedCollection(device_info->collections());
 }
 
 HidConnection::~HidConnection() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(closed_);
 }
 
 void HidConnection::Close() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!closed_);
 
   PlatformClose();
   closed_ = true;
 }
 
 void HidConnection::Read(const ReadCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  if (device_info_.max_input_report_size == 0) {
+  if (device_info_->max_input_report_size() == 0) {
     VLOG(1) << "This device does not support input reports.";
     callback.Run(false, NULL, 0);
     return;
   }
 
   PlatformRead(callback);
 }
 
 void HidConnection::Write(scoped_refptr<net::IOBuffer> buffer,
                           size_t size,
                           const WriteCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  if (device_info_.max_output_report_size == 0) {
+  if (device_info_->max_output_report_size() == 0) {
     VLOG(1) << "This device does not support output reports.";
     callback.Run(false);
     return;
   }
   DCHECK_GE(size, 1u);
   uint8_t report_id = buffer->data()[0];
-  if (device_info().has_report_id != (report_id != 0)) {
+  if (device_info_->has_report_id() != (report_id != 0)) {
     VLOG(1) << "Invalid output report ID.";
     callback.Run(false);
     return;
   }
   if (IsReportIdProtected(report_id)) {
     VLOG(1) << "Attempt to set a protected output report.";
     callback.Run(false);
     return;
   }
 
   PlatformWrite(buffer, size, callback);
 }
 
 void HidConnection::GetFeatureReport(uint8_t report_id,
                                      const ReadCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  if (device_info_.max_feature_report_size == 0) {
+  if (device_info_->max_feature_report_size() == 0) {
     VLOG(1) << "This device does not support feature reports.";
     callback.Run(false, NULL, 0);
     return;
   }
-  if (device_info().has_report_id != (report_id != 0)) {
+  if (device_info_->has_report_id() != (report_id != 0)) {
     VLOG(1) << "Invalid feature report ID.";
     callback.Run(false, NULL, 0);
     return;
   }
   if (IsReportIdProtected(report_id)) {
     VLOG(1) << "Attempt to get a protected feature report.";
     callback.Run(false, NULL, 0);
     return;
   }
 
   PlatformGetFeatureReport(report_id, callback);
 }
 
 void HidConnection::SendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
                                       size_t size,
                                       const WriteCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  if (device_info_.max_feature_report_size == 0) {
+  if (device_info_->max_feature_report_size() == 0) {
     VLOG(1) << "This device does not support feature reports.";
     callback.Run(false);
     return;
   }
   DCHECK_GE(size, 1u);
   uint8_t report_id = buffer->data()[0];
-  if (device_info().has_report_id != (report_id != 0)) {
+  if (device_info_->has_report_id() != (report_id != 0)) {
     VLOG(1) << "Invalid feature report ID.";
     callback.Run(false);
     return;
   }
   if (IsReportIdProtected(report_id)) {
     VLOG(1) << "Attempt to set a protected feature report.";
     callback.Run(false);
     return;
   }
 
   PlatformSendFeatureReport(buffer, size, callback);
 }
 
 bool HidConnection::CompleteRead(scoped_refptr<net::IOBuffer> buffer,
                                  size_t size,
                                  const ReadCallback& callback) {
   DCHECK_GE(size, 1u);
   uint8_t report_id = buffer->data()[0];
   if (IsReportIdProtected(report_id)) {
     VLOG(1) << "Filtered a protected input report.";
     return false;
   }
 
   callback.Run(true, buffer, size);
   return true;
 }
 
 bool HidConnection::IsReportIdProtected(uint8_t report_id) {
   HidCollectionInfo collection_info;
-  if (FindCollectionByReportId(device_info_, report_id, &collection_info)) {
+  if (FindCollectionByReportId(device_info_->collections(), report_id,
+                               &collection_info)) {
     return collection_info.usage.IsProtected();
   }
 
   return has_protected_collection();
 }
 
 PendingHidReport::PendingHidReport() {}
 
 PendingHidReport::~PendingHidReport() {}
 
 PendingHidRead::PendingHidRead() {}
 
 PendingHidRead::~PendingHidRead() {}
 
 }  // namespace device