devtools: api to inspect service worker for current webcontents

atom/browser/api/atom_api_web_contents.cc

@@ -615,6 +615,17 @@ void WebContents::UnregisterServiceWorker(
                                    callback);
 }
 
+void WebContents::InspectServiceWorker() {
+  for (const auto& agent_host : content::DevToolsAgentHost::GetOrCreateAll()) {
+    if (agent_host->GetType() ==
+        content::DevToolsAgentHost::TYPE_SERVICE_WORKER) {
+      OpenDevTools();
+      storage_->AttachTo(agent_host);
+      break;
+    }
+  }
+}
+
 mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   if (template_.IsEmpty())
@@ -657,6 +668,7 @@ mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
         .SetMethod("hasServiceWorker", &WebContents::HasServiceWorker)
         .SetMethod("unregisterServiceWorker",
                    &WebContents::UnregisterServiceWorker)
+        .SetMethod("inspectServiceWorker", &WebContents::InspectServiceWorker)
         .Build());
 
   return mate::ObjectTemplateBuilder(

atom/browser/api/atom_api_web_contents.h

@@ -68,6 +68,7 @@ class WebContents : public mate::EventEmitter,
   void InspectElement(int x, int y);
   void HasServiceWorker(const base::Callback<void(bool)>&);
   void UnregisterServiceWorker(const base::Callback<void(bool)>&);
+  void InspectServiceWorker();
 
   // Editing commands.
   void Undo();

atom/renderer/lib/web-view/web-view.coffee

@@ -268,6 +268,7 @@ registerWebViewElement = ->
     "replaceMisspelling"
     "send"
     "getId"
+    "inspectServiceWorker"
   ]
 
   # Forward proto.foo* method calls to WebViewImpl.foo*.

docs/api/web-view-tag.md

@@ -226,6 +226,10 @@ Returns whether guest page has a devtools window attached.
 
 Starts inspecting element at position (`x`, `y`) of guest page.
 
+### `<webview>`.inspectServiceWorker()
+
+Opens the devtools for the service worker context present in the guest page.
+
 ### `<webview>`.undo()
 
 Executes editing command `undo` in page.