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/ic/ppc/access-compiler-ppc.cc b/src/ic/ppc/access-compiler-ppc.cc
new file mode 100644
index 0000000..e98f517
--- /dev/null
+++ b/src/ic/ppc/access-compiler-ppc.cc
@@ -0,0 +1,46 @@
+// Copyright 2014 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.
+
+#include "src/v8.h"
+
+#if V8_TARGET_ARCH_PPC
+
+#include "src/ic/access-compiler.h"
+
+namespace v8 {
+namespace internal {
+
+#define __ ACCESS_MASM(masm)
+
+
+void PropertyAccessCompiler::GenerateTailCall(MacroAssembler* masm,
+                                              Handle<Code> code) {
+  __ Jump(code, RelocInfo::CODE_TARGET);
+}
+
+
+Register* PropertyAccessCompiler::load_calling_convention() {
+  // receiver, name, scratch1, scratch2, scratch3, scratch4.
+  Register receiver = LoadDescriptor::ReceiverRegister();
+  Register name = LoadDescriptor::NameRegister();
+  static Register registers[] = {receiver, name, r6, r3, r7, r8};
+  return registers;
+}
+
+
+Register* PropertyAccessCompiler::store_calling_convention() {
+  // receiver, name, scratch1, scratch2, scratch3.
+  Register receiver = StoreDescriptor::ReceiverRegister();
+  Register name = StoreDescriptor::NameRegister();
+  DCHECK(r6.is(ElementTransitionAndStoreDescriptor::MapRegister()));
+  static Register registers[] = {receiver, name, r6, r7, r8};
+  return registers;
+}
+
+
+#undef __
+}
+}  // namespace v8::internal
+
+#endif  // V8_TARGET_ARCH_PPC