Properly order the cc files based off the h files in base/.

base/metrics/field_trial.cc

Index: base/metrics/field_trial.cc
diff --git a/base/metrics/field_trial.cc b/base/metrics/field_trial.cc
index 5db88c1142914542fe6d02391be2805eb4015168..fceccde272ab8f0029807f5fa1fa5c9c8e3b9910 100644
--- a/base/metrics/field_trial.cc
+++ b/base/metrics/field_trial.cc
@@ -114,6 +114,8 @@ void FieldTrial::EnableBenchmarking() {
   enable_benchmarking_ = true;
 }
 
+FieldTrial::~FieldTrial() {}
+
 // static
 Time FieldTrial::GetBuildTime() {
   Time integral_build_time;
@@ -124,8 +126,6 @@ Time FieldTrial::GetBuildTime() {
   return integral_build_time;
 }
 
-FieldTrial::~FieldTrial() {}
-
 //------------------------------------------------------------------------------
 // FieldTrialList methods and members.