Collect array buffer allocation sizes for UMA in megabytes.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 2901840af92fbe0b1cd995ba1129a4cb4024befa..bcab746854c04c35201e31649b41ec118f2499e3 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -19473,12 +19473,7 @@ bool JSArrayBuffer::SetupAllocatingData(Handle<JSArrayBuffer> array_buffer,
   // Prevent creating array buffers when serializing.
   DCHECK(!isolate->serializer_enabled());
   if (allocated_length != 0) {
-    constexpr size_t kMinBigAllocation = 1 << 20;
-    if (allocated_length >= kMinBigAllocation) {
-      isolate->counters()->array_buffer_big_allocations()->AddSample(
-          sizeof(uint64_t) * kBitsPerByte -
-          base::bits::CountLeadingZeros64(allocated_length));
-    }
+    isolate->counters()->array_buffer_big_allocations()->Add(allocated_length);
     if (initialize) {
       data = isolate->array_buffer_allocator()->Allocate(allocated_length);
     } else {
@@ -19486,9 +19481,8 @@ bool JSArrayBuffer::SetupAllocatingData(Handle<JSArrayBuffer> array_buffer,
           allocated_length);
     }
     if (data == NULL) {
-      isolate->counters()->array_buffer_new_size_failures()->AddSample(
-          sizeof(uint64_t) * kBitsPerByte -
-          base::bits::CountLeadingZeros64(allocated_length));
+      isolate->counters()->array_buffer_new_size_failures()->Add(
+          allocated_length);
       return false;
     }
   } else {