Added activity logging for ext APIs with custom bindings

chrome/renderer/extensions/api_activity_logger.cc

+// Copyright (c) 2013 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 <string>
+#include "chrome/common/extensions/extension_messages.h"
+#include "chrome/renderer/chrome_render_process_observer.h"
+#include "chrome/renderer/extensions/api_activity_logger.h"
+#include "content/public/renderer/render_thread.h"
+#include "content/public/renderer/v8_value_converter.h"
+
+using content::V8ValueConverter;
+
+namespace extensions {
+
+APIActivityLogger::APIActivityLogger() : ChromeV8Extension(NULL) {
+  RouteStaticFunction("LogActivity", &APIActivityLogger::LogActivity);
+}
+
+// static
+v8::Handle<v8::Value> APIActivityLogger::LogActivity(
+    const v8::Arguments& args) {
+  DCHECK_GT(args.Length(), 2);
+  DCHECK(args[0]->IsString());
+  DCHECK(args[1]->IsString());
+  DCHECK(args[2]->IsArray());
+
+  // Get the simple values.
+  std::string ext_id = *v8::String::AsciiValue(args[0]->ToString());
+  ExtensionHostMsg_APIAction_Params params;
+  params.api_call = *v8::String::AsciiValue(args[1]->ToString());
+  if (args.Length() == 4)  // Extras are optional.
+    params.extra = *v8::String::AsciiValue(args[3]->ToString());
+  else
+    params.extra = "";
+
+  // Get the array of api call arguments.
+  v8::Local<v8::Array> arg_array = v8::Local<v8::Array>::Cast(args[2]);
+  if (arg_array->Length() > 0) {
+    scoped_ptr<V8ValueConverter> converter(V8ValueConverter::create());

[Matt Perry, 2013/03/14 20:32:31]

converter->FromV8Value(args[2]) should work and return a ListValue.

[felt, 2013/03/15 00:04:47]

converter->FromV8Value(args[2], v8::Context::GetCurrent()) returns a
base::Value*, not a ListValue; so I'm not sure that works.

[Matt Perry, 2013/03/15 17:51:06]

If args[2] is a v8::Array, the Value* will be of type ListValue. (You can use
GetAsList() to check).

+    scoped_ptr<ListValue> arg_list(new ListValue());
+    for (uint i = 0; i < arg_array->Length(); i++) {
+      arg_list->Set(i,
+                    converter->FromV8Value(arg_array->Get(i),
+                    v8::Context::GetCurrent()));
+    }
+    params.arguments.Swap(arg_list.get());
+  }
+
+  // Initiate the IPC process.

[Matt Perry, 2013/03/14 20:32:31]

nit: superfluous comment

[felt, 2013/03/15 00:04:47]

Done.

+  content::RenderThread::Get()->Send(
+      new ExtensionHostMsg_AddAPIActionToActivityLog(ext_id, params));
+
+  return v8::Undefined();
+}
+
+}  // namespace extensions
+