[1/5 chromium] Shows the clients which are controlled by ServiceWorker in DevTools.

This cl implements ServiceWorkerHandler::ActivateTarget() to focus the tab which is controlled by ServiceWorker.

Screenshot: https://code.google.com/p/chromium/issues/detail?id=466871#c65

1/5 chromium: This cl.
2/5 blink: https://codereview.chromium.org/1151993003/
3/5 chromium: https://codereview.chromium.org/1149383004/
4/5 blink: https://codereview.chromium.org/1164583002/
5/5 chromium: https://codereview.chromium.org/1143363009/

BUG=466871

Review URL: https://codereview.chromium.org/1160133002

Cr-Commit-Position: refs/heads/master@{#333671}

content/browser/devtools/protocol/service_worker_handler.cc

@@ -397,6 +397,20 @@ Response ServiceWorkerHandler::DeliverPushMessage(
   return Response::OK();
 }
 
+Response ServiceWorkerHandler::GetTargetInfo(DevToolsCommandId command_id,
+                                             const std::string& target_id) {
+  return Response::InternalError("Not implemented yet");
+}
+
+Response ServiceWorkerHandler::ActivateTarget(const std::string& target_id) {
+  scoped_refptr<DevToolsAgentHost> agent_host(
+      DevToolsAgentHost::GetForId(target_id));
+  if (!agent_host)
+    return Response::InvalidParams("targetId");
+  agent_host->Activate();
+  return Response::OK();
+}
+
 void ServiceWorkerHandler::OpenNewDevToolsWindow(int process_id,
                                                  int devtools_agent_route_id) {
   scoped_refptr<DevToolsAgentHostImpl> agent_host(

content/browser/devtools/protocol/service_worker_handler.h

@@ -59,6 +59,9 @@ class ServiceWorkerHandler : public DevToolsAgentHostClient,
   Response DeliverPushMessage(const std::string& origin,
                               const std::string& registration_id,
                               const std::string& data);
+  Response GetTargetInfo(DevToolsCommandId command_id,
+                         const std::string& target_id);
+  Response ActivateTarget(const std::string& target_id);
 
   // WorkerDevToolsManager::Observer implementation.
   void WorkerCreated(ServiceWorkerDevToolsAgentHost* host) override;