Revert 17963, 17962 and 17955: Random number generator in JS changes

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index f9524bc24f4be401b02983084f9ee7220a90f8f4..73c1d7d3a2990ebec5b62767e1541609df03a127 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -155,6 +155,7 @@ class LChunkBuilder;
   V(Parameter)                                 \
   V(Power)                                     \
   V(PushArgument)                              \
+  V(Random)                                    \
   V(RegExpLiteral)                             \
   V(Return)                                    \
   V(Ror)                                       \
@@ -4723,6 +4724,28 @@ 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,