Record Chrome trace events in tcmalloc heap profiles

chrome/browser/chrome_browser_main_linux.cc

Index: chrome/browser/chrome_browser_main_linux.cc
diff --git a/chrome/browser/chrome_browser_main_linux.cc b/chrome/browser/chrome_browser_main_linux.cc
index 3a3ea520aa933af80820ae281efd38bdd00b2931..9c709c1b5cc203d8adbdb6e24590a2d73ee5a337 100644
--- a/chrome/browser/chrome_browser_main_linux.cc
+++ b/chrome/browser/chrome_browser_main_linux.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/chrome_browser_main_linux.h"
 
+#include "base/debug/trace_memory.h"
+
 #if !defined(OS_CHROMEOS)
 #include "chrome/browser/storage_monitor/storage_monitor_linux.h"
 #include "content/public/browser/browser_thread.h"
@@ -133,6 +135,13 @@ void ChromeBrowserMainPartsLinux::PreProfileInit() {
   ChromeBrowserMainPartsPosix::PreProfileInit();
 }
 
+void ChromeBrowserMainPartsLinux::PreMainMessageLoopRun() {
+  ChromeBrowserMainPartsPosix::PreMainMessageLoopRun();
+
+  // TODO(jamescook): Only start this when tracing is flipped on.
+  base::TraceMemoryStart();
+}
+
 void ChromeBrowserMainPartsLinux::PostMainMessageLoopRun() {
   ChromeBrowserMainPartsPosix::PostMainMessageLoopRun();
 
@@ -142,4 +151,6 @@ void ChromeBrowserMainPartsLinux::PostMainMessageLoopRun() {
   // single browser_test.
   storage_monitor_.reset();
 #endif
+
+  base::TraceMemoryStop();
 }