[DevTools] Implement Target.setDiscoverTargets method.

content/browser/devtools/devtools_agent_host_impl.cc

Index: content/browser/devtools/devtools_agent_host_impl.cc
diff --git a/content/browser/devtools/devtools_agent_host_impl.cc b/content/browser/devtools/devtools_agent_host_impl.cc
index 96a24eaccbd822d8362860a9c8d4e0fd80d5b025..28764ba6b77def868355714c02ab9ec11b8699e1 100644
--- a/content/browser/devtools/devtools_agent_host_impl.cc
+++ b/content/browser/devtools/devtools_agent_host_impl.cc
@@ -70,8 +70,9 @@ DevToolsAgentHost::List DevToolsAgentHost::GetOrCreateAll() {
 
 // static
 void DevToolsAgentHost::DiscoverAllHosts(const DiscoveryCallback& callback) {
-  DevToolsManager* manager = DevToolsManager::GetInstance();
-  if (!manager->delegate() || !manager->delegate()->DiscoverTargets(callback))
+  DevToolsManagerDelegate* manager_delegate =
+      DevToolsManager::GetInstance()->GetDelegate();
+  if (!manager_delegate || !manager_delegate->DiscoverTargets(callback))
     callback.Run(DevToolsAgentHost::GetOrCreateAll());
 }
 
@@ -224,9 +225,10 @@ void DevToolsAgentHostImpl::ConnectWebContents(WebContents* wc) {
 }
 
 bool DevToolsAgentHostImpl::Inspect() {
-  DevToolsManager* manager = DevToolsManager::GetInstance();
-  if (manager->delegate()) {
-    manager->delegate()->Inspect(this);
+  DevToolsManagerDelegate* manager_delegate =
+      DevToolsManager::GetInstance()->GetDelegate();
+  if (manager_delegate) {
+    manager_delegate->Inspect(this);
     return true;
   }
   return false;
@@ -312,8 +314,8 @@ void DevToolsAgentHostImpl::NotifyCallbacks(
   AgentStateCallbacks copy(g_callbacks.Get());
   DevToolsManager* manager = DevToolsManager::GetInstance();
   manager->AgentHostStateChanged(agent_host, attached);
-  if (manager->delegate())
-    manager->delegate()->DevToolsAgentStateChanged(agent_host, attached);
+  if (manager->GetDelegate())
+    manager->GetDelegate()->DevToolsAgentStateChanged(agent_host, attached);
   for (AgentStateCallbacks::iterator it = copy.begin(); it != copy.end(); ++it)
      (*it)->Run(agent_host, attached);
 }