DevTools: remove DevToolsTargetDescriptor and its implementations, we are now based on devtools age…

chrome/browser/devtools/devtools_targets_ui.h

Index: chrome/browser/devtools/devtools_targets_ui.h
diff --git a/chrome/browser/devtools/devtools_targets_ui.h b/chrome/browser/devtools/devtools_targets_ui.h
index 43778a321d6793123b83a1665327a35b8b93be43..cbc45561a65ea3265bbf9feb9ecb5db968ae3145 100644
--- a/chrome/browser/devtools/devtools_targets_ui.h
+++ b/chrome/browser/devtools/devtools_targets_ui.h
@@ -18,7 +18,6 @@ class ListValue;
 class DictionaryValue;
 }
 
-class DevToolsTargetImpl;
 class Profile;
 
 class DevToolsTargetsUIHandler {
@@ -39,7 +38,8 @@ class DevToolsTargetsUIHandler {
       const Callback& callback,
       Profile* profile);
 
-  DevToolsTargetImpl* GetTarget(const std::string& target_id);
+  scoped_refptr<content::DevToolsAgentHost> GetTarget(
+      const std::string& target_id);
 
   virtual void Open(const std::string& browser_id, const std::string& url);
 
@@ -49,10 +49,12 @@ class DevToolsTargetsUIHandler {
   virtual void ForceUpdate();
 
  protected:
-  base::DictionaryValue* Serialize(const DevToolsTargetImpl& target);
+  base::DictionaryValue* Serialize(
+      scoped_refptr<content::DevToolsAgentHost> host);
   void SendSerializedTargets(const base::ListValue& list);
 
-  typedef std::map<std::string, DevToolsTargetImpl*> TargetMap;
+  using TargetMap =
+      std::map<std::string, scoped_refptr<content::DevToolsAgentHost>>;
   TargetMap targets_;
 
  private: