Move part of metrics from chrome/common to components

components/metrics/proto/perf_data.proto

 // 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package metrics;
 
@@ skipping 164 matching lines @@
 
     // Thread id.
     optional uint32 tid = 2;
 
     // Comm string's md5 prefix.
     // The comm string was field 3 and has been intentionally left out.
     optional uint64 comm_md5_prefix = 4;
 
     // Time the sample was taken.
     // Deprecated, use |sample_info| instead.
-    optional uint64 sample_time = 5 [deprecated=true];
+    optional uint64 sample_time = 5 [deprecated = true];

[Ilya Sherman, 2014/04/15 23:00:40]

Ditto

 
     // Info about the perf sample containing this event.
     optional SampleInfo sample_info = 6;
   }
 
   message MMapEvent {
     // Process id.
     optional uint32 pid = 1;
 
     // Thread id.
@@ skipping 151 matching lines @@
 
   // Records some stats about the serialized perf events.
   optional PerfEventStats stats = 4;
 
   // Not added from original: repeated uint64 metadata_mask = 5;
   // Not added from original: repeated PerfStringMetadata string_metadata = 6;
 
   // Build ID metadata.
   repeated PerfBuildID build_ids = 7;
 }