Fix MSVC error in PointerWithPayload::SetPayload().

In a DCHECK inside SetPayload(), MSVC gives a C4806 warning. Use the
right types to avoid this.

Also add pointer-with-payload.h to BUILD.gn.

Change-Id: I10a415250e7d2f06dab7a10bff48eef5890bb723
Reviewed-on: https://chromium-review.googlesource.com/c/1297991
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57003}

BUILD.gn

@@ -2355,6 +2355,7 @@ v8_source_set("v8_base") {
     "src/pending-compilation-error-handler.h",
     "src/perf-jit.cc",
     "src/perf-jit.h",
+    "src/pointer-with-payload.h",
     "src/profiler/allocation-tracker.cc",
     "src/profiler/allocation-tracker.h",
     "src/profiler/circular-queue-inl.h",

src/pointer-with-payload.h

@@ -88,9 +88,9 @@ class PointerWithPayload {
   }
 
   V8_INLINE void SetPayload(PayloadType new_payload) {
-    DCHECK_EQ(static_cast<PayloadType>(new_payload & kPayloadMask),
-              new_payload);
-    pointer_ = (pointer_ & kPointerMask) | static_cast<uintptr_t>(new_payload);
+    uintptr_t new_payload_ptr = static_cast<uintptr_t>(new_payload);
+    DCHECK_EQ(new_payload_ptr & kPayloadMask, new_payload_ptr);
+    pointer_ = (pointer_ & kPointerMask) | new_payload_ptr;
     DCHECK_EQ(GetPayload(), new_payload);
   }