[UMA] Include field trial tuples in the UMA upload.

chrome/common/metrics/metrics_log_base.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 "chrome/common/metrics/metrics_log_base.h"
 
 #include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/md5.h"
 #include "base/perftimer.h"
@@ skipping 105 matching lines @@
   xmlBufferPtr buffer() const { return buffer_; }
 
  private:
   xmlDocPtr doc_;
   xmlBufferPtr buffer_;
   xmlTextWriterPtr writer_;
 };
 
 MetricsLogBase::MetricsLogBase(const std::string& client_id, int session_id,
                                const std::string& version_string)
-    : start_time_(Time::Now()),
+    : num_events_(0),
+      start_time_(Time::Now()),
       client_id_(client_id),
       session_id_(base::IntToString(session_id)),
       locked_(false),
-      xml_wrapper_(new XmlWrapper),
-      num_events_(0) {
+      xml_wrapper_(new XmlWrapper) {
   int64_t build_time = GetBuildTime();
 
   // Write the XML version.
   StartElement("log");
   WriteAttribute("clientid", client_id_);
   WriteInt64Attribute("buildtime", build_time);
   WriteAttribute("appversion", version_string);
 
   // Write the protobuf version.
   if (IsTestingID(client_id_)) {
@@ skipping 322 matching lines @@
   for (size_t i = 0; i < histogram.bucket_count(); ++i) {
     if (snapshot.counts(i)) {
       HistogramEventProto::Bucket* bucket = histogram_proto->add_bucket();
       bucket->set_min(histogram.ranges(i));
       bucket->set_max(histogram.ranges(i + 1));
       bucket->set_bucket_index(i);
       bucket->set_count(snapshot.counts(i));
     }
   }
 }