Remove support for Javascript warnings in the VM.

runtime/lib/math_patch.dart

Index: runtime/lib/math_patch.dart
diff --git a/runtime/lib/math_patch.dart b/runtime/lib/math_patch.dart
index 667174cc61d2c13d1595c0bcf6c0f1689938d09c..4f0b85265253e30328e1c7680938090f695d6fc6 100644
--- a/runtime/lib/math_patch.dart
+++ b/runtime/lib/math_patch.dart
@@ -116,6 +116,7 @@ class _Random implements Random {
   //   _state[_kSTATE_HI] = state >> 32;
   // This is a native to prevent 64-bit operations in Dart, which
   // fail with --throw_on_javascript_int_overflow.
+  // TODO(regis): Implement in Dart and remove Random_nextState in math.cc.
   void _nextState() native "Random_nextState";
 
   int nextInt(int max) {
@@ -160,6 +161,7 @@ class _Random implements Random {
 
   // This is a native to prevent 64-bit operations in Dart, which
   // fail with --throw_on_javascript_int_overflow.
+  // TODO(regis): Implement here in Dart and remove native in math.cc.
   static Uint32List _setupSeed(int seed) native "Random_setupSeed";
   // Get a seed from the VM's random number provider.
   static Uint32List _initialSeed() native "Random_initialSeed";