[gn] Enable stricter build flags

src/heap/spaces-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_SPACES_INL_H_
 #define V8_HEAP_SPACES_INL_H_
 
 #include "src/heap/incremental-marking.h"
 #include "src/heap/spaces.h"
 #include "src/isolate.h"
@@ skipping 194 matching lines @@
   }
 
   return page;
 }
 
 Page* Page::ConvertNewToOld(Page* old_page) {
   DCHECK(!old_page->is_anchor());
   DCHECK(old_page->InNewSpace());
   OldSpace* old_space = old_page->heap()->old_space();
   old_page->set_owner(old_space);
-  old_page->SetFlags(0, ~0);
+  old_page->SetFlags(0, static_cast<uintptr_t>(~0));
   old_space->AccountCommitted(old_page->size());
   Page* new_page = Page::Initialize<kDoNotFreeMemory>(
       old_page->heap(), old_page, NOT_EXECUTABLE, old_space);
   new_page->InsertAfter(old_space->anchor()->prev_page());
   return new_page;
 }
 
 void Page::InitializeFreeListCategories() {
   for (int i = kFirstCategory; i < kNumberOfCategories; i++) {
     categories_[i].Initialize(static_cast<FreeListCategoryType>(i));
@@ skipping 439 matching lines @@
     other->allocation_info_.Reset(nullptr, nullptr);
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_INL_H_