Add Static Initializer for leak detector TLS

content/app/content_main_runner.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/app/content_main_runner.h"
 
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ skipping 88 matching lines @@
 
 #if !defined(OS_MACOSX)
 #include "content/public/common/zygote_fork_delegate_linux.h"
 #endif
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 #include "content/zygote/zygote_main.h"
 #endif
 
 #endif  // OS_POSIX
 
+#if defined(OS_CHROMEOS)
+#include "components/metrics/leak_detector/leak_detector.h"
+#endif
+
 #if defined(USE_NSS_CERTS)
 #include "crypto/nss_util.h"
 #endif
 
 namespace content {
 extern int GpuMain(const content::MainFunctionParams&);
 #if defined(ENABLE_PLUGINS)
 #if !defined(OS_LINUX)
 extern int PluginMain(const content::MainFunctionParams&);
 #endif
@@ skipping 630 matching lines @@
       // On OS X the renderer sandbox needs to be initialized later in the
       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
     } else {
       CHECK(InitializeSandbox());
     }
 #endif
 
     if (delegate_)
       delegate_->SandboxInitialized(process_type);
 
+#if defined (OS_CHROMEOS)
+    metrics::LeakDetector::StaticInit();

[Primiano Tucci (use gerrit), 2016/06/01 21:26:30]

maybe add a comment explaining that the TLS slot needs to be reserved early to
ensure it gets a low slow number and falls in the glibc fast-path which doesn't
require malloc()s.
Otherwise this will be super mysterious and somebody will be tempted to move it.

[Simon Que, 2016/06/02 17:55:17]

Done.

+#endif
+
     // Return -1 to indicate no early termination.
     return -1;
   }
 
   int Run() override {
     DCHECK(is_initialized_);
     DCHECK(!is_shutdown_);
     const base::CommandLine& command_line =
         *base::CommandLine::ForCurrentProcess();
     std::string process_type =
@@ skipping 74 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 };
 
 // static
 ContentMainRunner* ContentMainRunner::Create() {
   return new ContentMainRunnerImpl();
 }
 
 }  // namespace content