Fix stack overflows on Windows x64.

R=mstarzinger@chromium.org
TEST=win 64 not red anymore

Review URL: https://chromiumcodereview.appspot.com/10008005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11236 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flag-definitions.h

@@ -310,7 +310,9 @@ DEFINE_bool(enable_liveedit, true, "enable liveedit experimental feature")
 DEFINE_bool(break_on_abort, true, "always cause a debug break before aborting")
 
 // execution.cc
-DEFINE_int(stack_size, kPointerSize * 128,
+// Slightly less than 1MB on 64-bit, since Windows' default stack size for
+// the main execution thread is 1MB for both 32 and 64-bit.
+DEFINE_int(stack_size, kPointerSize * 125,
            "default size of stack region v8 is allowed to use (in kBytes)")
 
 // frames.cc

test/mjsunit/regress/regress-119429.js

@@ -29,7 +29,7 @@
 
 var d = 0;
 function recurse() {
-  if (++d == 26130) { // A magic number just below stack overflow  on ia32
+  if (++d == 25515) { // A magic number just below stack overflow  on ia32
     %DebugBreak();
   }
   recurse();