Change reinterpret_cast to std::copy to avoid undefined behavior

chrome/browser/metrics/antivirus_metrics_provider_win.cc

 // Copyright 2016 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 "chrome/browser/metrics/antivirus_metrics_provider_win.h"
 
 #include <iwscapi.h>
 #include <objbase.h>
 #include <stddef.h>
 #include <wbemidl.h>
@@ skipping 379 matching lines @@
 
     // See definition of PRODUCT_STATE structure above for how this is being
     // used.
     base::win::ScopedVariant product_state;
     hr = class_object->Get(L"productState", 0, product_state.Receive(), 0, 0);
 
     if (FAILED(hr) || product_state.type() != VT_I4)
       return RESULT_FAILED_TO_GET_PRODUCT_STATE;
 
     LONG state_val = V_I4(product_state.ptr());
-    // Map the values from product_state to the proto values.
-    switch (reinterpret_cast<PRODUCT_STATE*>(&state_val)->security_state) {
+    PRODUCT_STATE product_state_struct;
+    std::copy(reinterpret_cast<const char*>(&state_val),
+              reinterpret_cast<const char*>(&state_val) + sizeof state_val,
+              reinterpret_cast<char*>(&product_state_struct));
+    // Map the values from product_state_struct to the proto values.
+    switch (product_state_struct.security_state) {
       case 0:
         av_product.set_product_state(
             metrics::SystemProfileProto::AntiVirusState::
                 SystemProfileProto_AntiVirusState_STATE_OFF);
         break;
       case 1:
         av_product.set_product_state(
             metrics::SystemProfileProto::AntiVirusState::
                 SystemProfileProto_AntiVirusState_STATE_ON);
         break;
@@ skipping 87 matching lines @@
   std::string product_name("Trusteer Endpoint Protection");
   if (ShouldReportFullNames()) {
     av_product.set_product_name(product_name);
     av_product.set_product_version(product_version);
   }
   av_product.set_product_name_hash(metrics::HashName(product_name));
   av_product.set_product_version_hash(metrics::HashName(product_version));
 
   products->push_back(av_product);
 }