Make stack sampling profiler sample beyond startup.

chrome/common/stack_sampling_configuration.cc

Index: chrome/common/stack_sampling_configuration.cc
diff --git a/chrome/common/stack_sampling_configuration.cc b/chrome/common/stack_sampling_configuration.cc
index 15d0d8ea8b8f164bedf9fa8216977be08c2386e8..be9ed4b68e1fb975069489fa18cffc29d2e4c376 100644
--- a/chrome/common/stack_sampling_configuration.cc
+++ b/chrome/common/stack_sampling_configuration.cc
@@ -10,6 +10,7 @@
 #include "build/build_config.h"
 #include "chrome/common/channel_info.h"
 #include "chrome/common/chrome_switches.h"
+#include "components/metrics/call_stack_profile_metrics_provider.h"
 #include "components/version_info/version_info.h"
 #include "content/public/common/content_switches.h"
 
@@ -49,8 +50,11 @@ bool IsBrowserProcess() {
 }  // namespace
 
 StackSamplingConfiguration::StackSamplingConfiguration()
-    : configuration_(GenerateConfiguration()) {
-}
+    : configuration_(GenerateConfiguration()),
+      profile_params_(metrics::CallStackProfileParams::BROWSER_PROCESS,
+                      metrics::CallStackProfileParams::UI_THREAD,
+                      metrics::CallStackProfileParams::PROCESS_STARTUP,
+                      metrics::CallStackProfileParams::MAY_SHUFFLE) {}
 
 base::StackSamplingProfiler::SamplingParams
 StackSamplingConfiguration::GetSamplingParamsForCurrentProcess() const {
@@ -69,6 +73,12 @@ StackSamplingConfiguration::GetSamplingParamsForCurrentProcess() const {
   return params;
 }
 
+base::StackSamplingProfiler::CompletedCallback
+StackSamplingConfiguration::GetProfilerCallbackForCurrentProcess() {
+  return metrics::CallStackProfileMetricsProvider::GetProfilerCallback(
+      &profile_params_);
+}
+
 bool StackSamplingConfiguration::IsProfilerEnabledForCurrentProcess() const {
   if (IsBrowserProcess()) {
     switch (configuration_) {