Move Dart versions of math.min() and math.max() into VM patch file.

sdk/lib/_internal/js_runtime/lib/math_patch.dart

Index: sdk/lib/_internal/js_runtime/lib/math_patch.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/math_patch.dart b/sdk/lib/_internal/js_runtime/lib/math_patch.dart
index 5148540229c88ee7d1838ba9ecdb5f0b6b04f7c5..b37ba521b3e5b812409db9007d4274f04a33a1fa 100644
--- a/sdk/lib/_internal/js_runtime/lib/math_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/math_patch.dart
@@ -8,6 +8,14 @@ import 'dart:_js_helper' show patch, checkNum;
 import 'dart:typed_data' show ByteData;
 
 @patch
+T min<T extends num>(T a, T b) =>
+    JS('num', r'Math.min(#, #)', checkNum(a), checkNum(b)) as T;
+
+@patch
+T max<T extends num>(T a, T b) =>
+    JS('num', r'Math.max(#, #)', checkNum(a), checkNum(b)) as T;
+
+@patch
 double sqrt(num x) => JS('num', r'Math.sqrt(#)', checkNum(x));
 
 @patch