Fix comment on logs entry. Extension render crashed not part of normal renderer crashes.

components/metrics/proto/system_profile.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.
 //
 // Stores information about the user's brower and system configuration.
 // The system configuration fields are recorded once per client session.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
@@ skipping 428 matching lines @@
     // also makes the clock not count time the computer is suspended.
     // This field was added for M-35.
     optional int64 uptime_sec = 23;
 
     // Page loads along with renderer crashes and hangs, since page load count
     // roughly corresponds to usage.
     optional int32 page_load_count = 2;
     optional int32 renderer_crash_count = 3;
     optional int32 renderer_hang_count = 4;
 
-    // Number of renderer crashes that were for extensions.
-    // TODO(isherman): Figure out whether this is also counted in
-    // |renderer_crash_count|.
+    // Number of renderer crashes that were for extensions. These crashes are
+    // not counted in renderer_crash_count.
     optional int32 extension_renderer_crash_count = 5;
 
     // Number of non-renderer child process crashes.
     optional int32 child_process_crash_count = 6;
 
     // Number of times the browser has crashed while logged in as the "other
     // user" (guest) account.
     // Logged on ChromeOS only.
     optional int32 other_user_crash_count = 7;
 
@@ skipping 265 matching lines @@
   // then HAS_OFFSTORE is reported. This should be kept in sync with the
   // corresponding enum in chrome/browser/metrics/extensions_metrics_provider.cc
   enum ExtensionsState {
     NO_EXTENSIONS = 0;
     NO_OFFSTORE_VERIFIED = 1;
     NO_OFFSTORE_UNVERIFIED = 2;
     HAS_OFFSTORE = 3;
   }
   optional ExtensionsState offstore_extensions_state = 19;
 }