Make several cpu-profile tests more stable

test/cctest/test-cpu-profiler.cc

Index: test/cctest/test-cpu-profiler.cc
diff --git a/test/cctest/test-cpu-profiler.cc b/test/cctest/test-cpu-profiler.cc
index ce422b5b6ba179f257743a2d169ee5b81c1ee97e..bdccd1ee1060281f382a42bdedbfe5d8ccdcddac 100644
--- a/test/cctest/test-cpu-profiler.cc
+++ b/test/cctest/test-cpu-profiler.cc
@@ -1301,12 +1301,12 @@ TEST(JsNativeJsSample) {
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "start")));
 
-  int32_t duration_ms = 20;
+  int32_t duration_ms = 200;
   v8::Handle<v8::Value> args[] = {
     v8::Integer::New(env->GetIsolate(), duration_ms)
   };
   v8::CpuProfile* profile =
-      RunProfiler(env, function, args, ARRAY_SIZE(args), 10);
+      RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
 
   const v8::CpuProfileNode* root = profile->GetTopDownRoot();
   {
@@ -1386,12 +1386,12 @@ TEST(JsNativeJsRuntimeJsSample) {
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "start")));
 
-  int32_t duration_ms = 20;
+  int32_t duration_ms = 200;
   v8::Handle<v8::Value> args[] = {
     v8::Integer::New(env->GetIsolate(), duration_ms)
   };
   v8::CpuProfile* profile =
-      RunProfiler(env, function, args, ARRAY_SIZE(args), 10);
+      RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
 
   const v8::CpuProfileNode* root = profile->GetTopDownRoot();
   ScopedVector<v8::Handle<v8::String> > names(3);
@@ -1484,12 +1484,12 @@ TEST(JsNative1JsNative2JsSample) {
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "start")));
 
-  int32_t duration_ms = 20;
+  int32_t duration_ms = 200;
   v8::Handle<v8::Value> args[] = {
     v8::Integer::New(env->GetIsolate(), duration_ms)
   };
   v8::CpuProfile* profile =
-      RunProfiler(env, function, args, ARRAY_SIZE(args), 10);
+      RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
 
   const v8::CpuProfileNode* root = profile->GetTopDownRoot();
   ScopedVector<v8::Handle<v8::String> > names(3);