Add Static Initializer for leak detector TLS

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 75286cc2d3c9065831aba8ffd88b5308d383bd6a..1626ff468513076ad064a3eef600a8dade50ee9b 100644
--- a/chrome/app/chrome_main_delegate.cc
+++ b/chrome/app/chrome_main_delegate.cc
@@ -126,6 +126,10 @@
 #include "chrome/browser/policy/policy_path_parser.h"
 #endif
 
+#if defined(OS_CHROMEOS)
+#include "components/metrics/leak_detector/leak_detector.h"
+#endif
+
 #if !defined(DISABLE_NACL)
 #include "components/nacl/common/nacl_switches.h"
 #include "components/nacl/renderer/plugin/ppapi_entrypoints.h"
@@ -639,6 +643,15 @@ bool ChromeMainDelegate::BasicStartupComplete(int* exit_code) {
 
   content::SetContentClient(&chrome_content_client_);
 
+#if defined (OS_CHROMEOS)
+  // The TLS slot used by metrics::LeakDetector needs to be initialized early to
+  // ensure that it gets assigned a low slow number. If it gets initialized too
+  // late, the glibc TLS system will require a malloc call in order to allocate
+  // storage for a higher slot number. Normally that's not a problem, but in
+  // LeakDetector it will result in recursive alloc hook function calls.
+  metrics::LeakDetector::InitTLSSlot();
+#endif
+
   return false;
 }