HeadlessWebContents Observers for devtools clients attaching/detatching

headless/lib/browser/headless_web_contents_impl.cc

Index: headless/lib/browser/headless_web_contents_impl.cc
diff --git a/headless/lib/browser/headless_web_contents_impl.cc b/headless/lib/browser/headless_web_contents_impl.cc
index aea5aefc8f15bce048c19a4e765d00e8884c8c0e..07492082253fda0adb7a0c103042b449294941c1 100644
--- a/headless/lib/browser/headless_web_contents_impl.cc
+++ b/headless/lib/browser/headless_web_contents_impl.cc
@@ -192,9 +192,11 @@ HeadlessWebContentsImpl::HeadlessWebContentsImpl(
 #endif
   web_contents_->SetDelegate(web_contents_delegate_.get());
   render_process_host_->AddObserver(this);
+  agent_host_->AddObserver(this);
 }
 
 HeadlessWebContentsImpl::~HeadlessWebContentsImpl() {
+  agent_host_->RemoveObserver(this);
   if (render_process_host_)
     render_process_host_->RemoveObserver(this);
 }
@@ -277,6 +279,20 @@ void HeadlessWebContentsImpl::RemoveObserver(Observer* observer) {
   observer_map_.erase(it);
 }
 
+void HeadlessWebContentsImpl::DevToolsAgentHostAttached(
+    content::DevToolsAgentHost* agent_host) {
+  for (const auto& pair : observer_map_) {
+    pair.second->observer()->DevToolsClientAttached();
+  }
+}
+
+void HeadlessWebContentsImpl::DevToolsAgentHostDetached(
+    content::DevToolsAgentHost* agent_host) {
+  for (const auto& pair : observer_map_) {
+    pair.second->observer()->DevToolsClientDetached();
+  }
+}
+
 void HeadlessWebContentsImpl::RenderProcessExited(
     content::RenderProcessHost* host,
     base::TerminationStatus status,