Bump MaxRegularSpaceAllocationSize to InitialSemiSpaceSize() * 4/5

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 657d2452a97e7aab925f66df65f54c612504c21b..4455b5f723d5f3c6c0d1dff5e8bcb0a462e7aeac 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2686,10 +2686,9 @@ class JSObject: public JSReceiver {
   // don't want to be wasteful with long lived objects.
   static const int kMaxUncheckedOldFastElementsLength = 500;
 
-  // TODO(2790): HAllocate currently always allocates fast backing stores
-  // in new space, where on x64 we can only fit ~98K elements. Keep this
-  // limit lower than that until HAllocate is made smarter.
-  static const int kInitialMaxFastElementArray = 95000;
+  // Note that Heap::MaxRegularSpaceAllocationSize() puts a limit on
+  // permissible values (see the ASSERT in heap.cc).
+  static const int kInitialMaxFastElementArray = 100000;
 
   static const int kFastPropertiesSoftLimit = 12;
   static const int kMaxFastProperties = 64;