Update the libmetrics API to match the new Chrome interface.

src/platform/metrics/metrics_daemon.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef METRICS_DAEMON_H_
 #define METRICS_DAEMON_H_
 
 #include <dbus/dbus-glib.h>
 #include <sys/time.h>
 #include <time.h>
@@ skipping 45 matching lines @@
 
   // This is called at each network state change.  The new state is identified
   // by the string @newstate.  As a side effect, this method ships to Chrome
   // (or prints to stdout when testing) the name and duration of the state
   // that has ended.
   void LogNetworkStateChange(const char* newstate);
 
   // Given a string with the name of a state, returns the id for the state.
   NetworkStateId GetNetworkStateId(const char* state_name);
 
-  // Sends a stat to Chrome for transport to UMA.
-  void ChromePublishMetric(const char* name, int value);
-
-  // Prints a stat for testing.
-  void TestPublishMetric(const char* name, int value);
+  // Sends a stat to Chrome for transport to UMA (or prints it for
+  // testing). See MetricsLibrary::SendToChrome in metrics_library.h
+  // for a description of the arguments.
+  void PublishMetric(const char* name, int sample,
+                     int min, int max, int nbuckets);
 
 #if 0
   // Fetches a name-value hash table from DBus.
   bool GetProperties(::DBusGProxy* proxy, ::GHashTable** table);
 
   // The type descriptor for a glib hash table.
   GType hashtable_gtype;
 #endif
 
   // Array of network states of interest.
   static NetworkState network_states_[kNumberNetworkStates];
 
   bool testing_;                           // just testing
   NetworkStateId network_state_id_;        // id of current state
   struct timeval network_state_start_;     // when current state was entered
 };
 
 #endif  // METRICS_DAEMON_H_