[builtins] Migrate a bunch of Math builtins to C++.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 252c51cae4deb756dba58b500ae658fc5b872702..6301515022531aab9ff3ec299eb4ab89d684a950 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1560,6 +1560,11 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
     Handle<JSObject> math = factory->NewJSObject(cons, TENURED);
     DCHECK(math->IsJSObject());
     JSObject::AddProperty(global, name, math, DONT_ENUM);
+    SimpleInstallFunction(math, "acos", Builtins::kMathAcos, 1, true);
+    SimpleInstallFunction(math, "asin", Builtins::kMathAsin, 1, true);
+    SimpleInstallFunction(math, "atan", Builtins::kMathAtan, 1, true);
+    SimpleInstallFunction(math, "fround", Builtins::kMathFround, 1, true);
+    SimpleInstallFunction(math, "imul", Builtins::kMathImul, 2, true);
     SimpleInstallFunction(math, "max", Builtins::kMathMax, 2, false);
     SimpleInstallFunction(math, "min", Builtins::kMathMin, 2, false);
   }