Fix use of history timers in background threads.

src/compiler/wasm-compiler.cc

 // Copyright 2015 the V8 project 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 "src/compiler/wasm-compiler.h"
 
 #include <memory>
 
 #include "src/assembler-inl.h"
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 3994 matching lines @@
   // the code object of the c-entry stub.
   jsgraph_->CEntryStubConstant(1);
   DCHECK(!handles_initialized_);
 #if DEBUG
   handles_initialized_ = true;
 #endif  // DEBUG
 }
 
 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(),
              func_name_.length(), func_name_.start());
     } else {
       PrintF("Compiling WASM function %d:<unnamed>\n\n", func_index());
     }
   }
 
   double decode_ms = 0;
@@ skipping 92 matching lines @@
     wasm::ModuleBytesEnv* module_env, const wasm::WasmFunction* function) {
   WasmCompilationUnit unit(isolate, module_env, function);
   unit.InitializeHandles();
   unit.ExecuteCompilation();
   return unit.FinishCompilation(thrower);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8