[wasm] Adding metrics for Asm/Wasm.

src/wasm/wasm-module.cc

Index: src/wasm/wasm-module.cc
diff --git a/src/wasm/wasm-module.cc b/src/wasm/wasm-module.cc
index a1c2a7a3e10a0900ba4de3aaebc3fabe1ab3ca91..abfcaea3eb52fd28d0e6a438b8aed57c0ce8ba67 100644
--- a/src/wasm/wasm-module.cc
+++ b/src/wasm/wasm-module.cc
@@ -382,6 +382,8 @@ static MaybeHandle<JSFunction> LookupFunction(
 MaybeHandle<JSObject> WasmModule::Instantiate(Isolate* isolate,
                                               Handle<JSObject> ffi,
                                               Handle<JSArrayBuffer> memory) {
+  HistogramTimerScope wasm_instantiate_time_scope(
+      isolate->counters()->wasm_instantiate_time());
   this->shared_isolate = isolate;  // TODO(titzer): have a real shared isolate.
   ErrorThrower thrower(isolate, "WasmModule::Instantiate()");
   Factory* factory = isolate->factory();
@@ -402,6 +404,10 @@ MaybeHandle<JSObject> WasmModule::Instantiate(Isolate* isolate,
   //-------------------------------------------------------------------------
   // Allocate and initialize the linear memory.
   //-------------------------------------------------------------------------
+  isolate->counters()->wasm_min_mem_pages_memory()->AddSample(
+      instance.module->min_mem_pages);
+  isolate->counters()->wasm_max_mem_pages_memory()->AddSample(
+      instance.module->max_mem_pages);
   if (memory.is_null()) {
     if (!AllocateMemory(&thrower, isolate, &instance)) {
       return MaybeHandle<JSObject>();
@@ -424,6 +430,9 @@ MaybeHandle<JSObject> WasmModule::Instantiate(Isolate* isolate,
                                          *instance.globals_buffer);
   }
 
+  HistogramTimerScope wasm_compile_time_scope(
+      isolate->counters()->wasm_compile_time());
+
   //-------------------------------------------------------------------------
   // Compile wrappers to imported functions.
   //-------------------------------------------------------------------------
@@ -458,6 +467,9 @@ MaybeHandle<JSObject> WasmModule::Instantiate(Isolate* isolate,
   // Compile all functions in the module.
   //-------------------------------------------------------------------------
 
+  isolate->counters()->wasm_functions_per_module()->AddSample(
+      static_cast<int>(functions.size()));
+
   // First pass: compile each function and initialize the code table.
   index = FLAG_skip_compiling_wasm_funcs;
   while (index < functions.size()) {