Implement Math.random() purely in JavaScript.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index e336c49d1df195653fc75aca87d4fb6eaf3b4b0c..018a768b533919e8097d103e4ab3909c5563c2c2 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -155,7 +155,6 @@ class LChunkBuilder;
   V(Parameter)                                 \
   V(Power)                                     \
   V(PushArgument)                              \
-  V(Random)                                    \
   V(RegExpLiteral)                             \
   V(Return)                                    \
   V(Ror)                                       \
@@ -4595,28 +4594,6 @@ class HPower V8_FINAL : public HTemplateInstruction<2> {
 };
 
 
-class HRandom V8_FINAL : public HTemplateInstruction<1> {
- public:
-  DECLARE_INSTRUCTION_FACTORY_P1(HRandom, HValue*);
-
-  HValue* global_object() { return OperandAt(0); }
-
-  virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(Random)
-
- private:
-  explicit HRandom(HValue* global_object) {
-    SetOperandAt(0, global_object);
-    set_representation(Representation::Double());
-  }
-
-  virtual bool IsDeletable() const V8_OVERRIDE { return true; }
-};
-
-
 class HAdd V8_FINAL : public HArithmeticBinaryOperation {
  public:
   static HInstruction* New(Zone* zone,