[Translate] Integrate TranslateEventProto UMA logging into TranslateManager.

components/metrics/proto/chrome_user_metrics_extension.proto

 // Copyright 2014 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;
 option java_outer_classname = "ChromeUserMetricsExtensionProtos";
 option java_package = "org.chromium.components.metrics";
 
 package metrics;
 
 import "cast_logs.proto";
 import "histogram_event.proto";
 import "memory_leak_report.proto";
 import "omnibox_event.proto";
 import "profiler_event.proto";
 import "system_profile.proto";
+import "translate_event.proto";
 import "user_action_event.proto";
 import "perf_data.proto";
 import "sampled_profile.proto";
 
-// Next tag: 13
+// Next tag: 16
 message ChromeUserMetricsExtension {
   // The product (i.e. end user application) for a given UMA log.
   enum Product {
     // Google Chrome product family.
     CHROME = 0;
 
     // UMA metrics from Android Webview.
     ANDROID_WEBVIEW = 20;
 
     // Cast receivers, e.g. Chromecast
@@ skipping 25 matching lines @@
   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 TranslateEventProto translate_event = 15;
 
   // This field is no longer used. Use |sampled_profile| instead.
   repeated PerfDataProto perf_data = 8 [deprecated=true];
 
   // A list of all collected sample-based profiles since the last UMA upload.
   repeated SampledProfile sampled_profile = 11;
 
   // Additional data related with Cast-enabled devices.
   optional CastLogsProto cast_logs = 12;
 
   // Memory leak reports generated since the last UMA upload.
   repeated MemoryLeakReportProto memory_leak_report = 13;
 }