Profiler-instrumentation of the startup time

chrome/app/chrome_main.cc

Index: chrome/app/chrome_main.cc
diff --git a/chrome/app/chrome_main.cc b/chrome/app/chrome_main.cc
index 360b7e5def0c4a6700bf22110fe0ef2a7d5f356f..b80d1dfcb623f1dd8c9f7aeeedbd88ae4b25fcba 100644
--- a/chrome/app/chrome_main.cc
+++ b/chrome/app/chrome_main.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/app/chrome_main_delegate.h"
 
+#include "base/profiler/scoped_tracker.h"
+#include "chrome/common/chrome_version_info.h"
 #include "content/public/app/content_main.h"
 
 #if defined(OS_WIN)
@@ -63,6 +65,22 @@ int ChromeMain(int argc, const char** argv) {
   params.argv = argv;
 #endif
 
+  // TODO(vadimt): Remove the switch statement below once crbug.com/453640 is
+  // fixed.
+  // Enable profiler instrumentation depending on the channel.
+  switch (chrome::VersionInfo::GetChannel()) {
+    case chrome::VersionInfo::CHANNEL_UNKNOWN:
+    case chrome::VersionInfo::CHANNEL_CANARY:
+      tracked_objects::ScopedTracker::Enable();
+      break;
+
+    case chrome::VersionInfo::CHANNEL_DEV:
+    case chrome::VersionInfo::CHANNEL_BETA:
+    case chrome::VersionInfo::CHANNEL_STABLE:
+      // Don't enable instrumentation.
+      break;
+  }
+
   int rv = content::ContentMain(params);
 
 #if defined(OS_WIN)