Update from https://crrev.com/328418

base/threading/platform_thread_mac.mm

Index: base/threading/platform_thread_mac.mm
diff --git a/base/threading/platform_thread_mac.mm b/base/threading/platform_thread_mac.mm
index fd40d7952c3bc9d1bf7c049629fce7a74b135373..a9c347a5b53f4874bab0330e62f14f3e737d8091 100644
--- a/base/threading/platform_thread_mac.mm
+++ b/base/threading/platform_thread_mac.mm
@@ -42,14 +42,14 @@ void InitThreading() {
 }
 
 // static
-void PlatformThread::SetName(const char* name) {
+void PlatformThread::SetName(const std::string& name) {
   ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name);
   tracked_objects::ThreadData::InitializeThreadContext(name);
 
   // Mac OS X does not expose the length limit of the name, so
   // hardcode it.
   const int kMaxNameLength = 63;
-  std::string shortened_name = std::string(name).substr(0, kMaxNameLength);
+  std::string shortened_name = name.substr(0, kMaxNameLength);
   // pthread_setname() fails (harmlessly) in the sandbox, ignore when it does.
   // See http://crbug.com/47058
   pthread_setname_np(shortened_name.c_str());