Update V8 to version 4.1.0.21

This is a cherry-pick of all commits up to and including the
4.1.0.21 cherry-pick in Chromium.

Original commit message:

Version 4.1.0.21 (cherry-pick)

Merged 206e9136bde0f2b5ae8cb77afbb1e7833e5bd412

Unlink pages from the space page list after evacuation.

BUG=430201
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/953813002

Cr-Commit-Position: refs/branch-heads/4.1@{#22}
Cr-Branched-From: 2e08d2a7aa9d65d269d8c57aba82eb38a8cb0a18-refs/heads/candidates@{#25353}

---

FPIIM-449

Change-Id: I8c23c7bbb70772b4858fe8a47b64fa97ee0d1f8c
diff --git a/src/utils.cc b/src/utils.cc
index 165855a..40c8b40 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -7,6 +7,7 @@
 
 #include "src/v8.h"
 
+#include "src/base/functional.h"
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
 #include "src/utils.h"
@@ -77,6 +78,17 @@
 }
 
 
+size_t hash_value(BailoutId id) {
+  base::hash<int> h;
+  return h(id.id_);
+}
+
+
+std::ostream& operator<<(std::ostream& os, BailoutId id) {
+  return os << id.id_;
+}
+
+
 void PrintF(const char* format, ...) {
   va_list arguments;
   va_start(arguments, format);