[DevTools] Implement Target.setDiscoverTargets method.

content/browser/devtools/protocol/target_handler.h

Index: content/browser/devtools/protocol/target_handler.h
diff --git a/content/browser/devtools/protocol/target_handler.h b/content/browser/devtools/protocol/target_handler.h
index 9b7bcaba3a503d1dda0c9f1e7c2f37698b787e3d..8c79d14164e0456c1bf239241e80c54f5db3bf38 100644
--- a/content/browser/devtools/protocol/target_handler.h
+++ b/content/browser/devtools/protocol/target_handler.h
@@ -11,6 +11,7 @@
 #include "content/browser/devtools/protocol/devtools_protocol_dispatcher.h"
 #include "content/browser/devtools/service_worker_devtools_manager.h"
 #include "content/public/browser/devtools_agent_host_client.h"
+#include "content/public/browser/devtools_agent_host_observer.h"
 
 namespace content {
 
@@ -20,7 +21,8 @@ namespace devtools {
 namespace target {
 
 class TargetHandler : public DevToolsAgentHostClient,
-                      public ServiceWorkerDevToolsManager::Observer {
+                      public ServiceWorkerDevToolsManager::Observer,
+                      public DevToolsAgentHostObserver {
  public:
   using Response = DevToolsProtocolClient::Response;
 
@@ -48,13 +50,14 @@ class TargetHandler : public DevToolsAgentHostClient,
 
  private:
   using HostsMap = std::map<std::string, scoped_refptr<DevToolsAgentHost>>;
+  using RawHostsMap = std::map<std::string, DevToolsAgentHost*>;
 
   void UpdateServiceWorkers(bool waiting_for_debugger);
   void ReattachTargetsOfType(const HostsMap& new_hosts,
                              const std::string& type,
                              bool waiting_for_debugger);
   void TargetCreatedInternal(DevToolsAgentHost* host);
-  void TargetRemovedInternal(DevToolsAgentHost* host);
+  void TargetDestroyedInternal(DevToolsAgentHost* host);
   bool AttachToTargetInternal(DevToolsAgentHost* host,
                               bool waiting_for_debugger);
   void DetachFromTargetInternal(DevToolsAgentHost* host);
@@ -66,6 +69,11 @@ class TargetHandler : public DevToolsAgentHostClient,
   void WorkerVersionDoomed(ServiceWorkerDevToolsAgentHost* host) override;
   void WorkerDestroyed(ServiceWorkerDevToolsAgentHost* host) override;
 
+  // DevToolsAgentHostObserver implementation.
+  bool ShouldForceDevToolsAgentHostCreation() override;
+  void DevToolsAgentHostCreated(DevToolsAgentHost* agent_host) override;
+  void DevToolsAgentHostDestroyed(DevToolsAgentHost* agent_host) override;
+
   // DevToolsAgentHostClient implementation.
   void DispatchProtocolMessage(DevToolsAgentHost* agent_host,
                                const std::string& message) override;
@@ -80,6 +88,7 @@ class TargetHandler : public DevToolsAgentHostClient,
   RenderFrameHostImpl* render_frame_host_;
   HostsMap attached_hosts_;
   std::set<GURL> frame_urls_;
+  RawHostsMap reported_hosts_;
 
   DISALLOW_COPY_AND_ASSIGN(TargetHandler);
 };