Disable stress for some unit test.

Some unit tests specifically test scavenges and forcing them to do
global GCs instead makes no sense. The GC stress builder triggers this.

R=yangguo@chromium.org
TEST=cctest/test-api --stress-compaction

Review URL: https://codereview.chromium.org/11421098

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13068 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-api.cc

@@ -626,6 +626,8 @@ THREADED_TEST(UsingExternalAsciiString) {
 
 
 THREADED_TEST(ScavengeExternalString) {
+  i::FLAG_stress_compaction = false;
+  i::FLAG_gc_global = false;
   int dispose_count = 0;
   bool in_new_space = false;
   {
@@ -646,6 +648,8 @@ THREADED_TEST(ScavengeExternalString) {
 
 
 THREADED_TEST(ScavengeExternalAsciiString) {
+  i::FLAG_stress_compaction = false;
+  i::FLAG_gc_global = false;
   int dispose_count = 0;
   bool in_new_space = false;
   {
@@ -2546,6 +2550,8 @@ THREADED_TEST(ApiObjectGroupsCycle) {
 // TODO(mstarzinger): This should be a THREADED_TEST but causes failures
 // on the buildbots, so was made non-threaded for the time being.
 TEST(ApiObjectGroupsCycleForScavenger) {
+  i::FLAG_stress_compaction = false;
+  i::FLAG_gc_global = false;
   HandleScope scope;
   LocalContext env;
 

test/cctest/test-mark-compact.cc

@@ -311,6 +311,7 @@ static void WeakPointerCallback(v8::Persistent<v8::Value> handle, void* id) {
 }
 
 TEST(ObjectGroups) {
+  FLAG_incremental_marking = false;
   InitializeVM();
   GlobalHandles* global_handles = Isolate::Current()->global_handles();