Remove Weak{Map,Set}.prototype.clear.

Per Nov 2014 TC39 decision.

R=adamk@chromium.org
LOG=Y

Review URL: https://codereview.chromium.org/739303002

Cr-Commit-Position: refs/heads/master@{#25429}

src/weak-collection.js

@@ -96,16 +96,6 @@ function WeakMapDelete(key) {
 }
 
 
-function WeakMapClear() {
-  if (!IS_WEAKMAP(this)) {
-    throw MakeTypeError('incompatible_method_receiver',
-                        ['WeakMap.prototype.clear', this]);
-  }
-  // Replace the internal table with a new empty table.
-  %WeakCollectionInitialize(this);
-}
-
-
 // -------------------------------------------------------------------
 
 function SetUpWeakMap() {
@@ -122,8 +112,7 @@ function SetUpWeakMap() {
     "get", WeakMapGet,
     "set", WeakMapSet,
     "has", WeakMapHas,
-    "delete", WeakMapDelete,
-    "clear", WeakMapClear
+    "delete", WeakMapDelete
   ));
 }
 
@@ -198,16 +187,6 @@ function WeakSetDelete(value) {
 }
 
 
-function WeakSetClear() {
-  if (!IS_WEAKSET(this)) {
-    throw MakeTypeError('incompatible_method_receiver',
-                        ['WeakSet.prototype.clear', this]);
-  }
-  // Replace the internal table with a new empty table.
-  %WeakCollectionInitialize(this);
-}
-
-
 // -------------------------------------------------------------------
 
 function SetUpWeakSet() {
@@ -223,8 +202,7 @@ function SetUpWeakSet() {
   InstallFunctions($WeakSet.prototype, DONT_ENUM, $Array(
     "add", WeakSetAdd,
     "has", WeakSetHas,
-    "delete", WeakSetDelete,
-    "clear", WeakSetClear
+    "delete", WeakSetDelete
   ));
 }
 

test/mjsunit/es6/collections.js

@@ -266,7 +266,6 @@ assertTrue(WeakMap.prototype.set instanceof Function)
 assertTrue(WeakMap.prototype.get instanceof Function)
 assertTrue(WeakMap.prototype.has instanceof Function)
 assertTrue(WeakMap.prototype.delete instanceof Function)
-assertTrue(WeakMap.prototype.clear instanceof Function)
 
 
 // Test some common JavaScript idioms for WeakSets
@@ -275,7 +274,6 @@ assertTrue(s instanceof WeakSet);
 assertTrue(WeakSet.prototype.add instanceof Function)
 assertTrue(WeakSet.prototype.has instanceof Function)
 assertTrue(WeakSet.prototype.delete instanceof Function)
-assertTrue(WeakSet.prototype.clear instanceof Function)
 
 
 // Test class of instance and prototype.
@@ -471,30 +469,6 @@ for (var i = 9; i >= 0; i--) {
 })();
 
 
-// Test WeakMap clear
-(function() {
-  var k = new Object();
-  var w = new WeakMap();
-  w.set(k, 23);
-  assertTrue(w.has(k));
-  assertEquals(23, w.get(k));
-  w.clear();
-  assertFalse(w.has(k));
-  assertEquals(undefined, w.get(k));
-})();
-
-
-// Test WeakSet clear
-(function() {
-  var k = new Object();
-  var w = new WeakSet();
-  w.add(k);
-  assertTrue(w.has(k));
-  w.clear();
-  assertFalse(w.has(k));
-})();
-
-
 (function TestMinusZeroSet() {
   var s = new Set();
   s.add(-0);