Collect garbage at the beginning of cctest/test-cpu-profiler/FunctionCallSample

That way, we don't end up collecting all samples in the garbage
collector when the i18n extension is loaded.

BUG=v8:2745
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18714006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15547 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-cpu-profiler.cc

@@ -40,6 +40,7 @@ using i::CodeEntry;
 using i::CpuProfile;
 using i::CpuProfiler;
 using i::CpuProfilesCollection;
+using i::Heap;
 using i::ProfileGenerator;
 using i::ProfileNode;
 using i::ProfilerEventsProcessor;
@@ -995,6 +996,9 @@ TEST(FunctionCallSample) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
+  // Collect garbage that might have be generated while installing extensions.
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+
   v8::Script::Compile(v8::String::New(call_function_test_source))->Run();
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::New("start")));