Fix use of history timers in background threads.

src/compiler/wasm-compiler.cc

Index: src/compiler/wasm-compiler.cc
diff --git a/src/compiler/wasm-compiler.cc b/src/compiler/wasm-compiler.cc
index 41370c6adb06647e4bb1793b286471846a572eba..5fc178d3b6997eda80792f60edbbf9c1045f1397 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -4012,18 +4012,8 @@ void WasmCompilationUnit::InitializeHandles() {
 
 void WasmCompilationUnit::ExecuteCompilation() {
   DCHECK(handles_initialized_);
-  if (is_sync_) {
-    // TODO(karlschimpf): Make this work when asynchronous.
-    // https://bugs.chromium.org/p/v8/issues/detail?id=6361
-    HistogramTimerScope wasm_compile_function_time_scope(
-        isolate_->counters()->wasm_compile_function_time());
-    ExecuteCompilationInternal();
-    return;
-  }
-  ExecuteCompilationInternal();
-}
-
-void WasmCompilationUnit::ExecuteCompilationInternal() {
+  TimedHistogramScope wasm_compile_function_time_scope(
+      isolate_->counters()->wasm_compile_function_time());
   if (FLAG_trace_wasm_compiler) {
     if (func_name_.start() != nullptr) {
       PrintF("Compiling WASM function %d:'%.*s'\n\n", func_index(),