Fire 'stack' getter of error objects after GC.

test/mjsunit/eval-stack-trace.js

 // Copyright 2012 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
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 //
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 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Return the stack frames of an Error object.
-Error.prototype.getFrames = function() {
-  Error.prepareStackTrace = function(error, frames) {
-    return frames;
-  }
-  var frames = this.stack;
-  Error.prepareStackTrace = undefined;
+
+Error.prepareStackTrace = function(error, frames) {
   return frames;
 }
 
+Error.prototype.getFrames = function() {
+  var frames = this.stack;
+  return frames;
+}
+
 String.prototype.contains = function(pattern) {
   return this.indexOf(pattern) > -1;
 }
 
 // Check for every frame that a certain method returns the
 // expected value for every frame.
 Array.prototype.verifyEquals = function(frames, func_name) {
   this.forEach(
     function(element, index) {
       var frame = frames[index];
@@ skipping 146 matching lines @@
   //   test.js:186:3
   var frames = e.getFrames();
   assertEquals(2, frames.length);
   ["f"].verifyEquals(frames, "getFunctionName");
   [2].verifyEquals(frames, "getLineNumber");
   ["<anonymous>:2:"].verifyContains(frames, "toString");
   [true, false].verifyUndefined(frames, "getFileName");
   ["eval at <anonymous> ("].verifyContains(frames, "getEvalOrigin");
 }