[d8] Fix compilation for v8_fuzzilli

Bug: v8:10927
Change-Id: I37d3b591ceedeec0239fcec66d41bcf26f8503bd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2546683
Commit-Queue: Georg Neis <neis@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71250}

src/d8/cov.cc

@@ -42,7 +42,7 @@ extern "C" void __sanitizer_cov_trace_pc_guard_init(uint32_t* start,
   const char* shm_key = getenv("SHM_ID");
   if (!shm_key) {
     puts("[COV] no shared memory bitmap available, skipping");
-    shmem = (struct shmem_data*)base::Malloc(SHM_SIZE);
+    shmem = (struct shmem_data*)v8::base::Malloc(SHM_SIZE);
   } else {
     int fd = shm_open(shm_key, O_RDWR, S_IREAD | S_IWRITE);
     if (fd <= -1) {