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

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 9215d0fa27c9ee90adf2490fc64bba067e32264d..f7b310003e0c1140936a8c86d51638534acd824a 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -7489,6 +7489,16 @@ bool HOptimizedGraphBuilder::TryInlineBuiltinMethodCall(
         return true;
       }
       break;
+    case kMathRandom:
+      if (argument_count == 1 && check_type == RECEIVER_MAP_CHECK) {
+        AddCheckConstantFunction(expr->holder(), receiver, receiver_map);
+        Drop(1);  // Receiver.
+        HGlobalObject* global_object = Add<HGlobalObject>();
+        HRandom* result = New<HRandom>(global_object);
+        ast_context()->ReturnInstruction(result, expr->id());
+        return true;
+      }
+      break;
     case kMathMax:
     case kMathMin:
       if (argument_count == 3 && check_type == RECEIVER_MAP_CHECK) {
@@ -9863,6 +9873,14 @@ void HOptimizedGraphBuilder::GenerateLog(CallRuntime* call) {
 }
 
 
+// Fast support for Math.random().
+void HOptimizedGraphBuilder::GenerateRandomHeapNumber(CallRuntime* call) {
+  HGlobalObject* global_object = Add<HGlobalObject>();
+  HRandom* result = New<HRandom>(global_object);
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
 // Fast support for StringAdd.
 void HOptimizedGraphBuilder::GenerateStringAdd(CallRuntime* call) {
   ASSERT_EQ(2, call->arguments()->length());