Misc truncation fixes for gn builds with VS 2015

content/browser/accessibility/browser_accessibility_win.cc

 // Copyright (c) 2012 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 "content/browser/accessibility/browser_accessibility_win.h"
 
 #include <UIAutomationClient.h>
 #include <UIAutomationCoreApi.h>
 
 #include <algorithm>
@@ skipping 2755 matching lines @@
     BSTR* attrib_values,
     unsigned short* num_attribs) {
   if (!instance_active())
     return E_FAIL;
 
   if (!attrib_names || !name_space_id || !attrib_values || !num_attribs)
     return E_INVALIDARG;
 
   *num_attribs = max_attribs;
   if (*num_attribs > GetHtmlAttributes().size())
-    *num_attribs = GetHtmlAttributes().size();
+    *num_attribs = static_cast<unsigned short>(GetHtmlAttributes().size());
 
   for (unsigned short i = 0; i < *num_attribs; ++i) {
     attrib_names[i] = SysAllocString(
         base::UTF8ToUTF16(GetHtmlAttributes()[i].first).c_str());
     name_space_id[i] = 0;
     attrib_values[i] = SysAllocString(
         base::UTF8ToUTF16(GetHtmlAttributes()[i].second).c_str());
   }
   return S_OK;
 }
@@ skipping 1903 matching lines @@
     ia2_role = ia_role;
 
   win_attributes_->ia_role = ia_role;
   win_attributes_->ia_state = ia_state;
   win_attributes_->role_name = role_name;
   win_attributes_->ia2_role = ia2_role;
   win_attributes_->ia2_state = ia2_state;
 }
 
 }  // namespace content