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/x87/assembler-x87.h b/src/x87/assembler-x87.h
index d37c9d7..1da632f 100644
--- a/src/x87/assembler-x87.h
+++ b/src/x87/assembler-x87.h
@@ -148,6 +148,13 @@
     return kMaxNumAllocatableRegisters;
   }
 
+
+  // TODO(turbofan): Proper support for float32.
+  static int NumAllocatableAliasedRegisters() {
+    return NumAllocatableRegisters();
+  }
+
+
   static int ToAllocationIndex(X87Register reg) {
     return reg.code_;
   }
@@ -718,8 +725,11 @@
 
   void rcl(Register dst, uint8_t imm8);
   void rcr(Register dst, uint8_t imm8);
-  void ror(Register dst, uint8_t imm8);
-  void ror_cl(Register dst);
+
+  void ror(Register dst, uint8_t imm8) { ror(Operand(dst), imm8); }
+  void ror(const Operand& dst, uint8_t imm8);
+  void ror_cl(Register dst) { ror_cl(Operand(dst)); }
+  void ror_cl(const Operand& dst);
 
   void sar(Register dst, uint8_t imm8) { sar(Operand(dst), imm8); }
   void sar(const Operand& dst, uint8_t imm8);
@@ -909,9 +919,6 @@
 
   // TODO(lrn): Need SFENCE for movnt?
 
-  // Debugging
-  void Print();
-
   // Check the code size generated from label to here.
   int SizeOfCodeGeneratedSince(Label* label) {
     return pc_offset() - label->pos();