Reland "Implement Math.random() purely in JavaScript" plus fixes.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index a475d8ccb06e213c70135335c038939e6447740c..ca7831c2e7f7c7f17ea7c56face430349fcf913e 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -153,7 +153,6 @@ class LCodeGen;
   V(Parameter)                                  \
   V(Power)                                      \
   V(PushArgument)                               \
-  V(Random)                                     \
   V(RegExpLiteral)                              \
   V(Return)                                     \
   V(SeqStringGetChar)                           \
@@ -1424,28 +1423,6 @@ class LPower V8_FINAL : public LTemplateInstruction<1, 2, 0> {
 };
 
 
-class LRandom V8_FINAL : public LTemplateInstruction<1, 1, 3> {
- public:
-  LRandom(LOperand* global_object,
-          LOperand* scratch,
-          LOperand* scratch2,
-          LOperand* scratch3) {
-    inputs_[0] = global_object;
-    temps_[0] = scratch;
-    temps_[1] = scratch2;
-    temps_[2] = scratch3;
-  }
-
-  LOperand* global_object() { return inputs_[0]; }
-  LOperand* scratch() const { return temps_[0]; }
-  LOperand* scratch2() const { return temps_[1]; }
-  LOperand* scratch3() const { return temps_[2]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(Random, "random")
-  DECLARE_HYDROGEN_ACCESSOR(Random)
-};
-
-
 class LArithmeticD V8_FINAL : public LTemplateInstruction<1, 2, 0> {
  public:
   LArithmeticD(Token::Value op, LOperand* left, LOperand* right)