Reland r13188, r13194, r13256 (Deferred formatting of error stack trace during GC).

test/mjsunit/eval-stack-trace.js

Index: test/mjsunit/eval-stack-trace.js
diff --git a/test/mjsunit/eval-stack-trace.js b/test/mjsunit/eval-stack-trace.js
index 723d522c788616696ea1221addcccd35c187df4b..d83b84c16f283cf6710be54960be13848d957e71 100644
--- a/test/mjsunit/eval-stack-trace.js
+++ b/test/mjsunit/eval-stack-trace.js
@@ -26,12 +26,13 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Return the stack frames of an Error object.
+
+Error.prepareStackTrace = function(error, frames) {
+  return frames;
+}
+
 Error.prototype.getFrames = function() {
-  Error.prepareStackTrace = function(error, frames) {
-    return frames;
-  }
   var frames = this.stack;
-  Error.prepareStackTrace = undefined;
   return frames;
 }