[Android] Cache injected Java objects' methods info on renderer side

content/renderer/java/gin_java_bridge_object.cc

 // Copyright 2014 The Chromium 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 "content/renderer/java/gin_java_bridge_object.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "content/common/android/gin_java_bridge_errors.h"
 #include "content/common/android/gin_java_bridge_value.h"
 #include "content/public/renderer/v8_value_converter.h"
@@ skipping 65 matching lines @@
 
 gin::ObjectTemplateBuilder GinJavaBridgeObject::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   return gin::Wrappable<GinJavaBridgeObject>::GetObjectTemplateBuilder(isolate)
       .AddNamedPropertyInterceptor();
 }
 
 v8::Local<v8::Value> GinJavaBridgeObject::GetNamedProperty(
     v8::Isolate* isolate,
     const std::string& property) {
-  if (dispatcher_ && dispatcher_->HasJavaMethod(object_id_, property)) {
+  std::map<std::string, bool>::iterator method_pos =
+      known_methods_.find(property);
+  if (method_pos == known_methods_.end()) {
+    if (!dispatcher_) {
+      return v8::Local<v8::Value>();
+    }
+    known_methods_[property] = dispatcher_->HasJavaMethod(object_id_, property);
+  }
+  if (known_methods_[property]) {
     return gin::CreateFunctionTemplate(
                isolate,
                base::Bind(&GinJavaBridgeObject::InvokeMethod,
                           base::Unretained(this),
                           property))->GetFunction();
   } else {
     return v8::Local<v8::Value>();
   }
 }
 
@@ skipping 61 matching lines @@
     float float_value;
     gin_value->GetAsNonFinite(&float_value);
     return v8::Number::New(args->isolate(), float_value);
   }
   return v8::Undefined(args->isolate());
 }
 
 gin::WrapperInfo GinJavaBridgeObject::kWrapperInfo = {gin::kEmbedderNativeGin};
 
 }  // namespace content