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

pkg/dev_compiler/tool/input_sdk/patch/math_patch.dart

Index: pkg/dev_compiler/tool/input_sdk/patch/math_patch.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/patch/math_patch.dart b/pkg/dev_compiler/tool/input_sdk/patch/math_patch.dart
index 01c7ca3a7fe730b5134a6f53caf0f1be419bcaa1..b37ba521b3e5b812409db9007d4274f04a33a1fa 100644
--- a/pkg/dev_compiler/tool/input_sdk/patch/math_patch.dart
+++ b/pkg/dev_compiler/tool/input_sdk/patch/math_patch.dart
@@ -8,12 +8,12 @@ import 'dart:_js_helper' show patch, checkNum;
 import 'dart:typed_data' show ByteData;
 
 @patch
-num/*=T*/ min/*<T extends num>*/(num/*=T*/ a, num/*=T*/ b) =>
-    JS('num', r'Math.min(#, #)', checkNum(a), checkNum(b)) as num/*=T*/;
+T min<T extends num>(T a, T b) =>
+    JS('num', r'Math.min(#, #)', checkNum(a), checkNum(b)) as T;
 
 @patch
-num/*=T*/ max/*<T extends num>*/(num/*=T*/ a, num/*=T*/ b) =>
-    JS('num', r'Math.max(#, #)', checkNum(a), checkNum(b)) as num/*=T*/;
+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));