metrics: Add dbus interface for GetRandomPerfOutput

chromeos/dbus/debug_daemon_client.cc

Index: chromeos/dbus/debug_daemon_client.cc
diff --git a/chromeos/dbus/debug_daemon_client.cc b/chromeos/dbus/debug_daemon_client.cc
index 59e98405b866f82255ae0e6953d0cdcbd4c13640..ea60a492d2385567d9166875c5ac301af5ff86d4 100644
--- a/chromeos/dbus/debug_daemon_client.cc
+++ b/chromeos/dbus/debug_daemon_client.cc
@@ -161,6 +161,19 @@ class DebugDaemonClientImpl : public DebugDaemonClient {
                    callback));
   }
 
+  void GetPerfOutput(uint32_t duration,
+                     const GetPerfOutputCallback& callback) override {
+    dbus::MethodCall method_call(debugd::kDebugdInterface,
+                                 debugd::kGetRandomPerfOutput);
+    dbus::MessageWriter writer(&method_call);
+    writer.AppendUint32(duration);
+
+    debugdaemon_proxy_->CallMethod(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&DebugDaemonClientImpl::OnGetPerfOutput,
+                   weak_ptr_factory_.GetWeakPtr(), callback));
+  }
+
   void GetScrubbedLogs(const GetLogsCallback& callback) override {
     dbus::MethodCall method_call(debugd::kDebugdInterface,
                                  debugd::kGetFeedbackLogs);
@@ -461,6 +474,36 @@ class DebugDaemonClientImpl : public DebugDaemonClient {
     callback.Run(data);
   }
 
+  void OnGetPerfOutput(const GetPerfOutputCallback& callback,
+                       dbus::Response* response) {
+    if (!response) {
+      return;
+    }

[stevenjb, 2015/07/07 02:03:51]

nit: no {}

[Simon Que, 2015/07/07 04:39:46]

Done.

+
+    dbus::MessageReader reader(response);
+
+    int status = 0;
+    if (!reader.PopInt32(&status))
+      return;
+
+    const uint8* buffer = NULL;

[stevenjb, 2015/07/07 02:03:51]

nullptr

[Simon Que, 2015/07/07 04:39:46]

Done.

+    size_t buf_size = 0;
+
+    if (!reader.PopArrayOfBytes(&buffer, &buf_size))
+      return;
+    std::vector<uint8> perf_data;
+    if (buf_size > 0)
+      perf_data.insert(perf_data.end(), buffer, buffer + buf_size);
+
+    if (!reader.PopArrayOfBytes(&buffer, &buf_size))
+      return;
+    std::vector<uint8> perf_stat;
+    if (buf_size > 0)
+      perf_stat.insert(perf_stat.end(), buffer, buffer + buf_size);
+
+    callback.Run(status, perf_data, perf_stat);
+  }
+
   void OnGetAllLogs(const GetLogsCallback& callback,
                     dbus::Response* response) {
     std::map<std::string, std::string> logs;