Stack sampling profiler: run the profiler in the GPU process on trunk builds

chrome/gpu/chrome_content_gpu_client.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 "chrome/gpu/chrome_content_gpu_client.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
+#include "chrome/common/stack_sampling_configuration.h"
 #include "components/metrics/child_call_stack_profile_collector.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "services/shell/public/cpp/connector.h"
 #include "services/shell/public/cpp/interface_registry.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/gpu/gpu_arc_video_service.h"
 #endif
 
 namespace {
 
 #if defined(OS_CHROMEOS)
 void DeprecatedCreateGpuArcVideoService(
     const gpu::GpuPreferences& gpu_preferences,
     ::arc::mojom::VideoAcceleratorServiceClientRequest client_request) {
   chromeos::arc::GpuArcVideoService::DeprecatedConnect(
       base::MakeUnique<chromeos::arc::GpuArcVideoService>(gpu_preferences),
       std::move(client_request));
 }
 
 void CreateGpuArcVideoService(
     const gpu::GpuPreferences& gpu_preferences,
     ::arc::mojom::VideoAcceleratorServiceRequest request) {
   mojo::MakeStrongBinding(
       base::MakeUnique<chromeos::arc::GpuArcVideoService>(gpu_preferences),
       std::move(request));
 }
 #endif
 
-// Returns appropriate parameters for stack sampling on startup.
-base::StackSamplingProfiler::SamplingParams GetStartupSamplingParams() {
-  base::StackSamplingProfiler::SamplingParams params;
-  params.initial_delay = base::TimeDelta::FromMilliseconds(0);
-  params.bursts = 1;
-  params.samples_per_burst = 300;
-  params.sampling_interval = base::TimeDelta::FromMilliseconds(100);
-  return params;
-}
-
 base::LazyInstance<metrics::ChildCallStackProfileCollector>::Leaky
     g_call_stack_profile_collector = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 ChromeContentGpuClient::ChromeContentGpuClient()
     : stack_sampling_profiler_(
         base::PlatformThread::CurrentId(),
-        GetStartupSamplingParams(),
+        StackSamplingConfiguration::Get()->GetSamplingParamsForCurrentProcess(),
         g_call_stack_profile_collector.Get().GetProfilerCallback(
             metrics::CallStackProfileParams(
                 metrics::CallStackProfileParams::GPU_PROCESS,
                 metrics::CallStackProfileParams::GPU_MAIN_THREAD,
                 metrics::CallStackProfileParams::PROCESS_STARTUP,
                 metrics::CallStackProfileParams::MAY_SHUFFLE))) {
+  if (StackSamplingConfiguration::Get()->IsProfilerEnabledForCurrentProcess())
+    stack_sampling_profiler_.Start();
 }
 
 ChromeContentGpuClient::~ChromeContentGpuClient() {}
 
 void ChromeContentGpuClient::Initialize(
     base::FieldTrialList::Observer* observer) {
   DCHECK(!field_trial_syncer_);
   field_trial_syncer_.reset(
       new chrome_variations::ChildProcessFieldTrialSyncer(observer));
   const base::CommandLine& command_line =
@@ skipping 12 matching lines @@
 #endif
 }
 
 void ChromeContentGpuClient::ConsumeInterfacesFromBrowser(
     shell::InterfaceProvider* provider) {
   metrics::mojom::CallStackProfileCollectorPtr browser_interface;
   provider->GetInterface(&browser_interface);
   g_call_stack_profile_collector.Get().SetParentProfileCollector(
       std::move(browser_interface));
 }