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/compiler/simplified-operator-reducer.h b/src/compiler/simplified-operator-reducer.h
index 32f49ad..1e565b8 100644
--- a/src/compiler/simplified-operator-reducer.h
+++ b/src/compiler/simplified-operator-reducer.h
@@ -6,6 +6,7 @@
 #define V8_COMPILER_SIMPLIFIED_OPERATOR_REDUCER_H_
 
 #include "src/compiler/graph-reducer.h"
+#include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
@@ -16,17 +17,20 @@
 namespace compiler {
 
 // Forward declarations.
+class CommonOperatorBuilder;
 class JSGraph;
 class MachineOperatorBuilder;
 
 class SimplifiedOperatorReducer FINAL : public Reducer {
  public:
-  explicit SimplifiedOperatorReducer(JSGraph* jsgraph) : jsgraph_(jsgraph) {}
-  virtual ~SimplifiedOperatorReducer();
+  explicit SimplifiedOperatorReducer(JSGraph* jsgraph);
+  ~SimplifiedOperatorReducer() FINAL;
 
-  virtual Reduction Reduce(Node* node) OVERRIDE;
+  Reduction Reduce(Node* node) FINAL;
 
  private:
+  Reduction ReduceAnyToBoolean(Node* node);
+
   Reduction Change(Node* node, const Operator* op, Node* a);
   Reduction ReplaceFloat64(double value);
   Reduction ReplaceInt32(int32_t value);
@@ -39,9 +43,12 @@
   Graph* graph() const;
   Factory* factory() const;
   JSGraph* jsgraph() const { return jsgraph_; }
+  CommonOperatorBuilder* common() const;
   MachineOperatorBuilder* machine() const;
+  SimplifiedOperatorBuilder* simplified() { return &simplified_; }
 
   JSGraph* jsgraph_;
+  SimplifiedOperatorBuilder simplified_;
 
   DISALLOW_COPY_AND_ASSIGN(SimplifiedOperatorReducer);
 };