allocator: rename use_experimental_allocator_shim to use_allocator_shim

base/debug/thread_heap_usage_tracker.cc

Index: base/debug/thread_heap_usage_tracker.cc
diff --git a/base/debug/thread_heap_usage_tracker.cc b/base/debug/thread_heap_usage_tracker.cc
index 153653639457c22fbefb6e1364b3bcd0e1ba990f..060fbe268b817cf30832ef1c50d7944a1809f543 100644
--- a/base/debug/thread_heap_usage_tracker.cc
+++ b/base/debug/thread_heap_usage_tracker.cc
@@ -288,11 +288,11 @@ void ThreadHeapUsageTracker::EnableHeapTracking() {
 
   CHECK_EQ(false, g_heap_tracking_enabled) << "No double-enabling.";
   g_heap_tracking_enabled = true;
-#if BUILDFLAG(USE_EXPERIMENTAL_ALLOCATOR_SHIM)
+#if BUILDFLAG(USE_ALLOCATOR_SHIM)
   base::allocator::InsertAllocatorDispatch(&allocator_dispatch);
 #else
   CHECK(false) << "Can't enable heap tracking without the shim.";
-#endif  // BUILDFLAG(USE_EXPERIMENTAL_ALLOCATOR_SHIM)
+#endif  // BUILDFLAG(USE_ALLOCATOR_SHIM)
 }
 
 bool ThreadHeapUsageTracker::IsHeapTrackingEnabled() {
@@ -300,11 +300,11 @@ bool ThreadHeapUsageTracker::IsHeapTrackingEnabled() {
 }
 
 void ThreadHeapUsageTracker::DisableHeapTrackingForTesting() {
-#if BUILDFLAG(USE_EXPERIMENTAL_ALLOCATOR_SHIM)
+#if BUILDFLAG(USE_ALLOCATOR_SHIM)
   base::allocator::RemoveAllocatorDispatchForTesting(&allocator_dispatch);
 #else
   CHECK(false) << "Can't disable heap tracking without the shim.";
-#endif  // BUILDFLAG(USE_EXPERIMENTAL_ALLOCATOR_SHIM)
+#endif  // BUILDFLAG(USE_ALLOCATOR_SHIM)
   DCHECK_EQ(true, g_heap_tracking_enabled) << "Heap tracking not enabled.";
   g_heap_tracking_enabled = false;
 }