components: Add out-of-line copy ctors for complex classes.

components/omnibox/browser/omnibox_field_trial.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 "components/omnibox/browser/omnibox_field_trial.h"
 
 #include <cmath>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 75 matching lines @@
 }
 
 }  // namespace
 
 HUPScoringParams::ScoreBuckets::ScoreBuckets()
     : relevance_cap_(-1),
       half_life_days_(-1),
       use_decay_factor_(false) {
 }
 
+HUPScoringParams::ScoreBuckets::ScoreBuckets(const ScoreBuckets& other) =
+    default;
+
 HUPScoringParams::ScoreBuckets::~ScoreBuckets() {
 }
 
 double HUPScoringParams::ScoreBuckets::HalfLifeTimeDecay(
     const base::TimeDelta& elapsed_time) const {
   double time_ms;
   if ((half_life_days_ <= 0) ||
       ((time_ms = elapsed_time.InMillisecondsF()) <= 0))
     return 1.0;
 
@@ skipping 507 matching lines @@
   if (it != params.end())
     return it->second;
   // Fall back to the global instant extended context.
   it = params.find(rule + ":" + page_classification_str + ":*");
   if (it != params.end())
     return it->second;
   // Look up rule in the global context.
   it = params.find(rule + ":*:*");
   return (it != params.end()) ? it->second : std::string();
 }