Make callers of FromUTC(Local)Exploded in net/ use new time API.

net/disk_cache/blockfile/eviction.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.
 
 // The eviction policy is a very simple pure LRU, so the elements at the end of
 // the list are evicted until kCleanUpMargin free space is available. There is
 // only one list in use (Rankings::NO_USE), and elements are sent to the front
 // of the list whenever they are accessed.
 
 // The new (in-development) eviction policy adds re-use as a factor to evict
@@ skipping 256 matching lines @@
     if (header_->lru.filled)
       return;
 
     header_->lru.filled = 1;
 
     if (header_->create_time) {
       // This is the first entry that we have to evict, generate some noise.
       backend_->FirstEviction();
     } else {
       // This is an old file, but we may want more reports from this user so
-      // lets save some create_time.
+      // lets save some create_time. Conversion cannot fail here.
       Time::Exploded old = {0};
       old.year = 2009;
       old.month = 3;
       old.day_of_month = 1;
-      header_->create_time = Time::FromLocalExploded(old).ToInternalValue();
+      base::Time out_time;
+      bool conversion_success = Time::FromLocalExploded(old, &out_time);
+      DCHECK(conversion_success);
+      header_->create_time = out_time.ToInternalValue();
     }
   }
 }
 
 Rankings::List Eviction::GetListForEntry(EntryImpl* entry) {
   return Rankings::NO_USE;
 }
 
 bool Eviction::EvictEntry(CacheRankingsBlock* node, bool empty,
                           Rankings::List list) {
@@ skipping 305 matching lines @@
               Time::FromInternalValue(last2.get()->Data()->last_used));
   if (last3.get())
     CACHE_UMA(AGE, "HighUseAge", 0,
               Time::FromInternalValue(last3.get()->Data()->last_used));
   if (last4.get())
     CACHE_UMA(AGE, "DeletedAge", 0,
               Time::FromInternalValue(last4.get()->Data()->last_used));
 }
 
 }  // namespace disk_cache