Fix type truncation warnings in HID code.

device/hid/hid_report_descriptor.cc

 // Copyright 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_report_descriptor.h"
 
 #include "base/stl_util.h"
 
 namespace device {
 
@@ skipping 11 matching lines @@
     items_.push_back(linked_ptr<HidReportDescriptorItem>(item));
     header_index += item->GetSize();
   }
 }
 
 HidReportDescriptor::~HidReportDescriptor() {}
 
 void HidReportDescriptor::GetDetails(
     std::vector<HidCollectionInfo>* top_level_collections,
     bool* has_report_id,
-    uint16_t* max_input_report_size,
-    uint16_t* max_output_report_size,
-    uint16_t* max_feature_report_size) {
+    size_t* max_input_report_size,
+    size_t* max_output_report_size,
+    size_t* max_feature_report_size) {
   DCHECK(top_level_collections);
   DCHECK(max_input_report_size);
   DCHECK(max_output_report_size);
   DCHECK(max_feature_report_size);
   STLClearObject(top_level_collections);
 
   *has_report_id = false;
   *max_input_report_size = 0;
   *max_output_report_size = 0;
   *max_feature_report_size = 0;
 
   // Global tags data:
   HidUsageAndPage::Page current_usage_page = HidUsageAndPage::kPageUndefined;
-  uint16_t current_report_count = 0;
-  uint16_t cached_report_count = 0;
-  uint16_t current_report_size = 0;
-  uint16_t cached_report_size = 0;
-  uint16_t current_input_report_size = 0;
-  uint16_t current_output_report_size = 0;
-  uint16_t current_feature_report_size = 0;
+  size_t current_report_count = 0;
+  size_t cached_report_count = 0;
+  size_t current_report_size = 0;
+  size_t cached_report_size = 0;
+  size_t current_input_report_size = 0;
+  size_t current_output_report_size = 0;
+  size_t current_feature_report_size = 0;
 
   // Local tags data:
-  uint16_t current_usage = 0;
+  uint32_t current_usage = 0;
 
   for (std::vector<linked_ptr<HidReportDescriptorItem> >::const_iterator
            items_iter = items().begin();
        items_iter != items().end();
        ++items_iter) {
     linked_ptr<HidReportDescriptorItem> current_item = *items_iter;
 
     switch (current_item->tag()) {
       // Main tags:
       case HidReportDescriptorItem::kTagCollection:
-        if (!current_item->parent()) {
+        if (!current_item->parent() &&
+            (current_usage <= std::numeric_limits<uint16_t>::max())) {
           // This is a top-level collection.
           HidCollectionInfo collection;
-          collection.usage = HidUsageAndPage(current_usage, current_usage_page);
+          collection.usage = HidUsageAndPage(
+              static_cast<uint16_t>(current_usage), current_usage_page);
           top_level_collections->push_back(collection);
         }
         break;
       case HidReportDescriptorItem::kTagInput:
         current_input_report_size += current_report_count * current_report_size;
         break;
       case HidReportDescriptorItem::kTagOutput:
         current_output_report_size +=
             current_report_count * current_report_size;
         break;
       case HidReportDescriptorItem::kTagFeature:
         current_feature_report_size +=
             current_report_count * current_report_size;
         break;
 
       // Global tags:
       case HidReportDescriptorItem::kTagUsagePage:
         current_usage_page =
-            (HidUsageAndPage::Page)current_item->GetShortData();
+            static_cast<HidUsageAndPage::Page>(current_item->GetShortData());
         break;
       case HidReportDescriptorItem::kTagReportId:
         if (top_level_collections->size() > 0) {
           // Store report ID.
           top_level_collections->back().report_ids.insert(
               current_item->GetShortData());
           *has_report_id = true;
 
           // Update max report sizes.
           *max_input_report_size =
@@ skipping 47 matching lines @@
   *max_feature_report_size =
       std::max(*max_feature_report_size, current_feature_report_size);
 
   // Convert bits into bytes
   *max_input_report_size /= kBitsPerByte;
   *max_output_report_size /= kBitsPerByte;
   *max_feature_report_size /= kBitsPerByte;
 }
 
 }  // namespace device