Revert "heap: Change DCHECK in FromInnerAddress to CHECK"

This reverts commit 77f24899.

The check never triggered, so it's safe to assume that interior objects
are not accessed in the write barrier.

Change-Id: I7e0857011114cd36068239dbda96d1f0d21801cc

Bug: 1009683
Change-Id: I7e0857011114cd36068239dbda96d1f0d21801cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1886679Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710349}

third_party/blink/renderer/platform/heap/heap_page.h

@@ -1077,7 +1077,7 @@ PLATFORM_EXPORT ALWAYS_INLINE BasePage* PageFromObject(const void* object) {
   BasePage* page = reinterpret_cast<BasePage*>(BlinkPageAddress(address) +
                                                kBlinkGuardPageSize);
   // Page must have a valid magic.
-  CHECK(page->IsValid());
+  DCHECK(page->IsValid());
 #if DCHECK_IS_ON()
   DCHECK(page->Contains(address));
 #endif