MetricsService: Send a hash of the UMA log in a header.

chrome/common/metrics/metrics_log_manager_unittest.cc

Index: chrome/common/metrics/metrics_log_manager_unittest.cc
===================================================================
--- chrome/common/metrics/metrics_log_manager_unittest.cc	(revision 228712)
+++ chrome/common/metrics/metrics_log_manager_unittest.cc	(working copy)
@@ -18,13 +18,15 @@
 // Dummy serializer that just stores logs in memory.
 class DummyLogSerializer : public MetricsLogManager::LogSerializer {
  public:
-  virtual void SerializeLogs(const std::vector<std::string>& logs,
-                             MetricsLogManager::LogType log_type) OVERRIDE {
+  virtual void SerializeLogs(
+      const std::vector<MetricsLogManager::SerializedLog>& logs,
+      MetricsLogManager::LogType log_type) OVERRIDE {
     persisted_logs_[log_type] = logs;
   }
 
-  virtual void DeserializeLogs(MetricsLogManager::LogType log_type,
-                               std::vector<std::string>* logs) OVERRIDE {
+  virtual void DeserializeLogs(
+      MetricsLogManager::LogType log_type,
+      std::vector<MetricsLogManager::SerializedLog>* logs) OVERRIDE {
     ASSERT_NE(static_cast<void*>(NULL), logs);
     *logs = persisted_logs_[log_type];
   }
@@ -35,7 +37,7 @@
   }
 
   // In-memory "persitent storage".
-  std::vector<std::string> persisted_logs_[2];
+  std::vector<MetricsLogManager::SerializedLog> persisted_logs_[2];
 };
 
 }  // namespace
@@ -139,8 +141,8 @@
 }
 
 TEST(MetricsLogManagerTest, StoreAndLoad) {
-  std::vector<std::string> initial_logs;
-  std::vector<std::string> ongoing_logs;
+  std::vector<MetricsLogManager::SerializedLog> initial_logs;
+  std::vector<MetricsLogManager::SerializedLog> ongoing_logs;
 
   // Set up some in-progress logging in a scoped log manager simulating the
   // leadup to quitting, then persist as would be done on quit.
@@ -149,7 +151,8 @@
     DummyLogSerializer* serializer = new DummyLogSerializer;
     log_manager.set_log_serializer(serializer);
     // Simulate a log having already been unsent from a previous session.
-    std::string log = "proto";
+    MetricsLogManager::SerializedLog log;
+    log.SetLogText("proto");
     serializer->persisted_logs_[MetricsLogManager::ONGOING_LOG].push_back(log);
     EXPECT_FALSE(log_manager.has_unsent_logs());
     log_manager.LoadPersistedUnsentLogs();