[Offline Pages] Expanding event logger to be used by harness.

components/offline_pages/offline_event_logger.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 "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "components/offline_pages/offline_event_logger.h"
 
 namespace offline_pages {
 
+extern const size_t kMaxLogCount = 50;
+
 OfflineEventLogger::OfflineEventLogger()
-    : activities_(kMaxLogCount), is_logging_(false) {}
+    : activities_(0), is_logging_(false), client_(nullptr) {}
 
 OfflineEventLogger::~OfflineEventLogger() {}
 
+void OfflineEventLogger::Clear() {
+  activities_.clear();
+}
+
 void OfflineEventLogger::SetIsLogging(bool is_logging) {
   is_logging_ = is_logging;
 }
 
 bool OfflineEventLogger::GetIsLogging() {
   return is_logging_;
 }
 
-void OfflineEventLogger::Clear() {
-  activities_.clear();
+void OfflineEventLogger::GetLogs(std::vector<std::string>* records) {
+  DCHECK(records);
+  records->insert(records->end(), activities_.begin(), activities_.end());
 }
 
 void OfflineEventLogger::RecordActivity(const std::string& activity) {
-  if (!is_logging_) {
+  if (!is_logging_ || activity.empty())
     return;
-  }
-  if (activities_.size() == kMaxLogCount)
-    activities_.pop_back();
 
   base::Time::Exploded current_time;
   base::Time::Now().LocalExplode(&current_time);
 
   std::string date_string = base::StringPrintf(
       "%d %02d %02d %02d:%02d:%02d",
       current_time.year,
       current_time.month,
       current_time.day_of_month,
       current_time.hour,
       current_time.minute,
       current_time.second);
 
-  activities_.push_front(date_string + ": " + activity);
+  std::string log_message = date_string + ": " + activity;
+  if (client_)
+    client_->CustomLog(log_message);
+
+  if (activities_.size() == kMaxLogCount)
+    activities_.pop_back();
+
+  activities_.push_front(log_message);
 }
 
-void OfflineEventLogger::GetLogs(std::vector<std::string>* records) {
-  DCHECK(records);
-  for (std::deque<std::string>::iterator it = activities_.begin();
-       it != activities_.end(); it++) {
-    if (!it->empty())
-      records->push_back(*it);
-  }
+void OfflineEventLogger::SetClient(Client* client) {
+  DCHECK(client);
+  SetIsLogging(true);
+  client_ = client;
 }
 
 }  // namespace offline_pages