Remove NPAPI from browser and utility

components/metrics/proto/profiler_event.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.
 //
 // Performance metrics collected via Chrome's built-in profiler.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 option java_outer_classname = "ProfilerEventProtos";
@@ skipping 87 matching lines @@
 
     // The time that a uniformly randomly sampled instance of this task spent
     // waiting (e.g.  in a message loop) before it was run.
     optional int32 queue_time_sampled = 10;
 
     // The type of process within which this task was executed.
     enum ProcessType {
       UNKNOWN = 0;  // Should not reach here
       BROWSER = 1;
       RENDERER = 2;
-      PLUGIN = 3;
+      PLUGIN = 3;  // Deprecated. Should not be sent as of M51 due to
+                   // NPAPI removal.
       WORKER = 4;
       NACL_LOADER = 5;
       UTILITY = 6;
       PROFILE_IMPORT = 7;
       ZYGOTE = 8;
       SANDBOX_HELPER = 9;
       NACL_BROKER = 10;
       GPU = 11;
       PPAPI_PLUGIN = 12;
       PPAPI_BROKER = 13;
     }
     optional ProcessType process_type = 11;
 
     // The local PID for the process within which this task was executed.
     optional uint32 process_id = 12;
   }
   repeated TrackedObject tracked_object = 3;
 }