Only turn on UMA WASM metric when synchronous.

src/compiler/wasm-compiler.h

 // 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.
 
 #ifndef V8_COMPILER_WASM_COMPILER_H_
 #define V8_COMPILER_WASM_COMPILER_H_
 
 #include <memory>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 30 matching lines @@
 
 // Expose {Node} and {Graph} opaquely as {wasm::TFNode} and {wasm::TFGraph}.
 typedef compiler::Node TFNode;
 typedef compiler::JSGraph TFGraph;
 }  // namespace wasm
 
 namespace compiler {
 class WasmCompilationUnit final {
  public:
   WasmCompilationUnit(Isolate* isolate, wasm::ModuleBytesEnv* module_env,
-                      const wasm::WasmFunction* function);
+                      const wasm::WasmFunction* function, bool is_sync = true);
   WasmCompilationUnit(Isolate* isolate, wasm::ModuleEnv* module_env,
-                      wasm::FunctionBody body, wasm::WasmName name, int index);
+                      wasm::FunctionBody body, wasm::WasmName name, int index,
+                      bool is_sync = true);
 
   Zone* graph_zone() { return graph_zone_.get(); }
   int func_index() const { return func_index_; }
 
   void InitializeHandles();
   void ExecuteCompilation();
   Handle<Code> FinishCompilation(wasm::ErrorThrower* thrower);
 
   static Handle<Code> CompileWasmFunction(wasm::ErrorThrower* thrower,
                                           Isolate* isolate,
                                           wasm::ModuleBytesEnv* module_env,
                                           const wasm::WasmFunction* function);
 
  private:
   SourcePositionTable* BuildGraphForWasmFunction(double* decode_ms);
 
   Isolate* isolate_;
   wasm::ModuleEnv* module_env_;
   wasm::FunctionBody func_body_;
   wasm::WasmName func_name_;
+  bool is_sync_;
   // The graph zone is deallocated at the end of ExecuteCompilation.
   std::unique_ptr<Zone> graph_zone_;
   JSGraph* jsgraph_;
   Zone compilation_zone_;
   CompilationInfo info_;
   std::unique_ptr<CompilationJob> job_;
   int func_index_;
   wasm::Result<wasm::DecodeStruct*> graph_construction_result_;
   bool ok_ = true;
 #if DEBUG
   bool handles_initialized_ = false;
 #endif  // DEBUG
   ZoneVector<trap_handler::ProtectedInstructionData>
       protected_instructions_;  // Instructions that are protected by the signal
                                 // handler.
 
+  void ExecuteCompilationInternal();
+
   DISALLOW_COPY_AND_ASSIGN(WasmCompilationUnit);
 };
 
 // Wraps a JS function, producing a code object that can be called from WASM.
 Handle<Code> CompileWasmToJSWrapper(Isolate* isolate, Handle<JSReceiver> target,
                                     wasm::FunctionSig* sig, uint32_t index,
                                     Handle<String> module_name,
                                     MaybeHandle<String> import_name,
                                     wasm::ModuleOrigin origin);
 
@@ skipping 301 matching lines @@
   }
 
   int AddParameterNodes(Node** args, int pos, int param_count,
                         wasm::FunctionSig* sig);
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_