Add use counter for sorting non-packed JSArrays

This CL adds a counter for sorting non-packed JSArrays where
Object.prototype was modified, or the prototype of the instance
differs from Array.prototype.

This is the Chromium side of the change.
The V8-side CL: https://crrev.com/c/1051650

R=jgruber@chromium.org

Bug: v8:7382
Change-Id: I46f0963b8b79380fe5c5defa50dba517df77b72c
Reviewed-on: https://chromium-review.googlesource.com/1051651Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#558263}

third_party/blink/public/platform/web_feature.mojom

@@ -1906,6 +1906,8 @@ enum WebFeature {
   kWebRtcVaapiHWVP8Encoding = 2433,
   kPerformanceResourceTimingInitiatorType = 2434,
   kPaymentRequestInvalidCurrencyCode = 2435,
+  kV8ArraySortNoElementsProtector = 2436,
+  kV8ArrayPrototypeSortJSArrayModifiedPrototype = 2437,
 
   // Add new features immediately above this line. Don't change assigned
   // numbers of any item, and don't reuse removed slots.

third_party/blink/renderer/bindings/core/v8/use_counter_callback.cc

@@ -145,6 +145,9 @@ void UseCounterCallback(v8::Isolate* isolate,
     case v8::Isolate::kDeoptimizerDisableSpeculation:
       blink_feature = WebFeature::kV8DeoptimizerDisableSpeculation;
       break;
+    case v8::Isolate::kArrayPrototypeSortJSArrayModifiedPrototype:
+      blink_feature = WebFeature::kV8ArrayPrototypeSortJSArrayModifiedPrototype;
+      break;
     default:
       // This can happen if V8 has added counters that this version of Blink
       // does not know about. It's harmless.

tools/metrics/histograms/enums.xml

@@ -18655,6 +18655,8 @@ Called by update_net_error_codes.py.-->
   <int value="2433" label="WebRtcVaapiHWVP8Encoding"/>
   <int value="2434" label="PerformanceResourceTimingInitiatorType"/>
   <int value="2435" label="PaymentRequestInvalidCurrencyCode"/>
+  <int value="2436" label="V8ArraySortNoElementsProtector"/>
+  <int value="2437" label="V8ArrayPrototypeSortJSArrayModifiedPrototype"/>
 </enum>
 
 <enum name="FeedbackSource">