[DevTools] Add canProfilePower command and plumb power handlers to RenderViewDevToolsAgentHost

content/browser/devtools/devtools_power_handler.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/browser/devtools/devtools_power_handler.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "content/browser/devtools/devtools_protocol_constants.h"
 #include "content/browser/power_profiler/power_profiler_service.h"
 
 namespace content {
 
 static inline base::Time convertMonotonicTimeToWallTime(
     const base::TimeTicks& tick) {
   return base::Time::UnixEpoch() + (tick - base::TimeTicks::UnixEpoch());
 }
 
 DevToolsPowerHandler::DevToolsPowerHandler() {
   RegisterCommandHandler(devtools::Power::start::kName,
                          base::Bind(&DevToolsPowerHandler::OnStart,
                                     base::Unretained(this)));
   RegisterCommandHandler(devtools::Power::end::kName,
                          base::Bind(&DevToolsPowerHandler::OnEnd,
                                     base::Unretained(this)));
+  RegisterCommandHandler(devtools::Power::canProfilePower::kName,
+                         base::Bind(&DevToolsPowerHandler::OnCanProfilePower,
+                                    base::Unretained(this)));
 }
 
 DevToolsPowerHandler::~DevToolsPowerHandler() {
 }
 
 void DevToolsPowerHandler::OnPowerEvent(const PowerEventVector& events) {
   base::DictionaryValue* params = new base::DictionaryValue();
   base::ListValue* event_list = new base::ListValue();
 
   std::vector<PowerEvent>::const_iterator iter;
@@ skipping 26 matching lines @@
 scoped_refptr<DevToolsProtocol::Response>
 DevToolsPowerHandler::OnEnd(scoped_refptr<DevToolsProtocol::Command> command) {
   if (PowerProfilerService::GetInstance()->IsAvailable()) {
     PowerProfilerService::GetInstance()->RemoveObserver(this);
     return command->SuccessResponse(NULL);
   }
 
   return command->InternalErrorResponse("Power profiler service unavailable");
 }
 
+scoped_refptr<DevToolsProtocol::Response>
+DevToolsPowerHandler::OnCanProfilePower(
+    scoped_refptr<DevToolsProtocol::Command> command) {
+  base::DictionaryValue* result = new base::DictionaryValue();
+  result->SetBoolean(devtools::kResult,
+                     PowerProfilerService::GetInstance()->IsAvailable());
+
+  return command->SuccessResponse(result);
+}
+
 }  // namespace content