Set process phases in the StackSamplingProfiler.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 3b02122611bd9780277972e204e75b338839e0de..af98e290536b12a0f0e266853efb24d806b2c382 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -27,6 +27,7 @@
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "base/profiler/scoped_tracker.h"
+#include "base/profiler/stack_sampling_profiler.h"
 #include "base/run_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
@@ -926,6 +927,9 @@ void ChromeBrowserMainParts::PostMainMessageLoopStart() {
 
   for (size_t i = 0; i < chrome_extra_parts_.size(); ++i)
     chrome_extra_parts_[i]->PostMainMessageLoopStart();
+
+  base::StackSamplingProfiler::SetProcessPhase(
+      metrics::CallStackProfileMetricsProvider::MAIN_LOOP_START);
 }
 
 int ChromeBrowserMainParts::PreCreateThreads() {
@@ -2095,6 +2099,11 @@ void ChromeBrowserMainParts::PostDestroyThreads() {
 #endif  // defined(OS_ANDROID)
 }
 
+void ChromeBrowserMainParts::PreShutdown() {
+  base::StackSamplingProfiler::SetProcessPhase(
+      metrics::CallStackProfileMetricsProvider::SHUTDOWN_START);
+}
+
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {