src: align PerformanceState class name with conventions

Class names are written in UpperCamelCase. Otherwise, this looks like
it’s a variable, not a class name.

PR-URL: #32539
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: addaleax

src/env-inl.h

@@ -944,7 +944,7 @@ inline const Mutex& Environment::extra_linked_bindings_mutex() const {
   return extra_linked_bindings_mutex_;
 }
 
-inline performance::performance_state* Environment::performance_state() {
+inline performance::PerformanceState* Environment::performance_state() {
   return performance_state_.get();
 }
 

src/env.cc

@@ -348,7 +348,7 @@ Environment::Environment(IsolateData* isolate_data,
       this);
 
   performance_state_ =
-      std::make_unique<performance::performance_state>(isolate());
+      std::make_unique<performance::PerformanceState>(isolate());
   performance_state_->Mark(
       performance::NODE_PERFORMANCE_MILESTONE_ENVIRONMENT);
   performance_state_->Mark(performance::NODE_PERFORMANCE_MILESTONE_NODE_START,

src/env.h

@@ -64,7 +64,7 @@ class FileHandleReadWrap;
 }
 
 namespace performance {
-class performance_state;
+class PerformanceState;
 }
 
 namespace tracing {
@@ -1016,7 +1016,7 @@ class Environment : public MemoryRetainer {
   inline std::vector<std::unique_ptr<fs::FileHandleReadWrap>>&
       file_handle_read_wrap_freelist();
 
-  inline performance::performance_state* performance_state();
+  inline performance::PerformanceState* performance_state();
   inline std::unordered_map<std::string, uint64_t>* performance_marks();
 
   void CollectUVExceptionInfo(v8::Local<v8::Value> context,
@@ -1323,7 +1323,7 @@ class Environment : public MemoryRetainer {
 
   AliasedInt32Array stream_base_state_;
 
-  std::unique_ptr<performance::performance_state> performance_state_;
+  std::unique_ptr<performance::PerformanceState> performance_state_;
   std::unordered_map<std::string, uint64_t> performance_marks_;
 
   bool has_run_bootstrapping_code_ = false;

src/node_perf.cc

@@ -44,7 +44,7 @@ const uint64_t timeOrigin = PERFORMANCE_NOW();
 const double timeOriginTimestamp = GetCurrentTimeInMicroseconds();
 uint64_t performance_v8_start;
 
-void performance_state::Mark(enum PerformanceMilestone milestone,
+void PerformanceState::Mark(enum PerformanceMilestone milestone,
                              uint64_t ts) {
   this->milestones[milestone] = ts;
   TRACE_EVENT_INSTANT_WITH_TIMESTAMP0(
@@ -267,7 +267,7 @@ void MarkGarbageCollectionEnd(Isolate* isolate,
                               GCCallbackFlags flags,
                               void* data) {
   Environment* env = static_cast<Environment*>(data);
-  performance_state* state = env->performance_state();
+  PerformanceState* state = env->performance_state();
   // If no one is listening to gc performance entries, do not create them.
   if (!state->observers[NODE_PERFORMANCE_ENTRY_TYPE_GC])
     return;
@@ -553,7 +553,7 @@ void Initialize(Local<Object> target,
                 void* priv) {
   Environment* env = Environment::GetCurrent(context);
   Isolate* isolate = env->isolate();
-  performance_state* state = env->performance_state();
+  PerformanceState* state = env->performance_state();
 
   target->Set(context,
               FIXED_ONE_BYTE_STRING(isolate, "observerCounts"),

src/node_perf_common.h

@@ -52,9 +52,9 @@ enum PerformanceEntryType {
   NODE_PERFORMANCE_ENTRY_TYPE_INVALID
 };
 
-class performance_state {
+class PerformanceState {
  public:
-  explicit performance_state(v8::Isolate* isolate) :
+  explicit PerformanceState(v8::Isolate* isolate) :
     root(
       isolate,
       sizeof(performance_state_internal)),