Profiler-instrumentation of the startup time.

chrome/app/chrome_main_delegate.cc

Index: chrome/app/chrome_main_delegate.cc
diff --git a/chrome/app/chrome_main_delegate.cc b/chrome/app/chrome_main_delegate.cc
index e17bf8128a60481133fadce18f5e95458de29590..5a3212de3ed898be943ca46367315c1512330e40 100644
--- a/chrome/app/chrome_main_delegate.cc
+++ b/chrome/app/chrome_main_delegate.cc
@@ -971,3 +971,17 @@ ChromeMainDelegate::CreateContentUtilityClient() {
   return g_chrome_content_utility_client.Pointer();
 #endif
 }
+
+bool ChromeMainDelegate::ShouldEnableProfilerRecording() {
+  switch (chrome::VersionInfo::GetChannel()) {
+    case chrome::VersionInfo::CHANNEL_UNKNOWN:
+    case chrome::VersionInfo::CHANNEL_CANARY:
+      return true;
+    case chrome::VersionInfo::CHANNEL_DEV:
+    case chrome::VersionInfo::CHANNEL_BETA:
+    case chrome::VersionInfo::CHANNEL_STABLE:
+    default:
+      // Don't enable instrumentation.
+      return false;
+  }
+}