two cpu profiler tests are flaky on windows.

test/cctest/test-cpu-profiler.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 923 matching lines @@
 
 
 TEST(SourceURLSupportForNewFunctions) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
   v8::Script::Compile(v8::String::New(cpu_profiler_sourceURL_source))->Run();
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::New("start")));
   v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
-  int32_t profiling_interval_ms = 100;
+  int32_t profiling_interval_ms = 200;
+#if defined(_WIN32) || defined(_WIN64)
+  // 200ms is not enough on Windows. See
+  // https://code.google.com/p/v8/issues/detail?id=2628
+  profiling_interval_ms = 500;
+#endif
 
   // Cold run.
   v8::Local<v8::String> profile_name = v8::String::New("my_profile");
   cpu_profiler->StartCpuProfiling(profile_name);
   v8::Handle<v8::Value> args[] = { v8::Integer::New(profiling_interval_ms) };
   function->Call(env->Global(), ARRAY_SIZE(args), args);
   const v8::CpuProfile* profile = cpu_profiler->StopCpuProfiling(profile_name);
   CHECK_NE(NULL, profile);
 
   // Dump collected profile to have a better diagnostic in case of failure.
   reinterpret_cast<i::CpuProfile*>(
       const_cast<v8::CpuProfile*>(profile))->Print();
   const v8::CpuProfileNode* root = profile->GetTopDownRoot();
   const v8::CpuProfileNode* startNode = GetChild(root, "start");
 
   CHECK_EQ(v8::String::New("cpu_profiler_sourceURL_source.js"),
            startNode->GetScriptResourceName());
 
   cpu_profiler->DeleteAllCpuProfiles();
 }
 
 TEST(LogExistingFunctionSourceURLCheck) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
   v8::Script::Compile(v8::String::New(cpu_profiler_sourceURL_source))->Run();
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::New("start")));
   v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
-  int32_t profiling_interval_ms = 100;
+  int32_t profiling_interval_ms = 200;
 
   // Warm up.
   v8::Handle<v8::Value> args[] = { v8::Integer::New(profiling_interval_ms) };
   function->Call(env->Global(), ARRAY_SIZE(args), args);
 
+#if defined(_WIN32) || defined(_WIN64)
+  // 200ms is not enough on Windows. See
+  // https://code.google.com/p/v8/issues/detail?id=2628
+  profiling_interval_ms = 500;
+#endif
   v8::Local<v8::String> profile_name = v8::String::New("my_profile");
   cpu_profiler->StartCpuProfiling(profile_name);
   function->Call(env->Global(), ARRAY_SIZE(args), args);
   const v8::CpuProfile* profile = cpu_profiler->StopCpuProfiling(profile_name);
   CHECK_NE(NULL, profile);
 
   // Dump collected profile to have a better diagnostic in case of failure.
   reinterpret_cast<i::CpuProfile*>(
       const_cast<v8::CpuProfile*>(profile))->Print();
   const v8::CpuProfileNode* root = profile->GetTopDownRoot();
   const v8::CpuProfileNode* startNode = GetChild(root, "start");
   CHECK_EQ(v8::String::New("cpu_profiler_sourceURL_source.js"),
            startNode->GetScriptResourceName());
 
   cpu_profiler->DeleteAllCpuProfiles();
 }