Make stack sampling profiler sample beyond startup.

components/metrics/child_call_stack_profile_collector_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/metrics/child_call_stack_profile_collector.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 42 matching lines @@
 
   ChildCallStackProfileCollectorTest()
       : receiver_impl_(new Receiver(MakeRequest(&receiver_))) {}
 
   void CollectEmptyProfiles(
       const CallStackProfileParams& params,
       size_t profile_count) {
     base::StackSamplingProfiler::CallStackProfiles profiles;
     for (size_t i = 0; i < profile_count; ++i)
       profiles.push_back(base::StackSamplingProfiler::CallStackProfile());
-    child_collector_.GetProfilerCallback(params).Run(std::move(profiles));
+    base::StackSamplingProfiler::SamplingParams sampling_params;
+    child_collector_.GetProfilerCallback(params).Run(std::move(profiles),
+                                                     &sampling_params);
   }
 
   const std::vector<ChildCallStackProfileCollector::ProfilesState>&
   profiles() const {
     return child_collector_.profiles_;
   }
 
   base::MessageLoop loop_;
   mojom::CallStackProfileCollectorPtr receiver_;
   std::unique_ptr<Receiver> receiver_impl_;
@@ skipping 94 matching lines @@
   CollectEmptyProfiles(
       CallStackProfileParams(CallStackProfileParams::GPU_PROCESS,
                              CallStackProfileParams::GPU_MAIN_THREAD,
                              CallStackProfileParams::THREAD_HUNG,
                              CallStackProfileParams::PRESERVE_ORDER),
       1);
   EXPECT_EQ(0u, profiles().size());
 }
 
 }  // namespace metrics