Move part of metrics from chrome/common to components

chrome/common/metrics/proto/chrome_user_metrics_extension.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.
-//
-// Protocol buffer for Chrome UMA (User Metrics Analysis).
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-
-package metrics;
-
-import "histogram_event.proto";
-import "omnibox_event.proto";
-import "profiler_event.proto";
-import "system_profile.proto";
-import "user_action_event.proto";
-import "perf_data.proto";
-
-// Next tag: 11
-message ChromeUserMetricsExtension {
-  // The product (i.e. end user application) for a given UMA log.
-  enum Product {
-    // Google Chrome product family.
-    CHROME = 0;
-  }
-  // The product corresponding to this log. Note: The default value is Chrome,
-  // so Chrome products will not transmit this field.
-  optional Product product = 10 [default = CHROME];
-
-  // The id of the client install that generated these events.
-  //
-  // For Chrome clients, this id is unique to a top-level (one level above the
-  // "Default" directory) Chrome user data directory [1], and so is shared among
-  // all Chrome user profiles contained in this user data directory.
-  // An id of 0 is reserved for test data (monitoring and internal testing) and
-  // should normally be ignored in analysis of the data.
-  // [1] http://www.chromium.org/user-experience/user-data-directory
-  optional fixed64 client_id = 1;
-
-  // The session id for this user.
-  // Values such as tab ids are only meaningful within a particular session.
-  // The client keeps track of the session id and sends it with each event.
-  // The session id is simply an integer that is incremented each time the user
-  // relaunches Chrome.
-  optional int32 session_id = 2;
-
-  // Information about the user's browser and system configuration.
-  optional SystemProfileProto system_profile = 3;
-
-  // This message will log one or more of the following event types:
-  repeated UserActionEventProto user_action_event = 4;
-  repeated OmniboxEventProto omnibox_event = 5;
-  repeated HistogramEventProto histogram_event = 6;
-  repeated ProfilerEventProto profiler_event = 7;
-
-  repeated PerfDataProto perf_data = 8;
-}