Fix bugs in the new task manager Impl so that ported old browsertests pass

chrome/browser/task_management/providers/web_contents/devtools_task.cc

Index: chrome/browser/task_management/providers/web_contents/devtools_task.cc
diff --git a/chrome/browser/task_management/providers/web_contents/devtools_task.cc b/chrome/browser/task_management/providers/web_contents/devtools_task.cc
index 84e190737177e492141f812af050c4bed6054693..3bafc76cb19665e459c5ef34cb469cff48ea4c43 100644
--- a/chrome/browser/task_management/providers/web_contents/devtools_task.cc
+++ b/chrome/browser/task_management/providers/web_contents/devtools_task.cc
@@ -9,21 +9,10 @@
 namespace task_management {
 
 DevToolsTask::DevToolsTask(content::WebContents* web_contents)
-    : RendererTask(RendererTask::GetTitleFromWebContents(web_contents),
-                   RendererTask::GetFaviconFromWebContents(web_contents),
-                   web_contents,
-                   web_contents->GetRenderProcessHost()) {
+    : TabContentsTask(web_contents) {
 }
 
 DevToolsTask::~DevToolsTask() {
 }
 
-void DevToolsTask::UpdateTitle() {
-  // In the case of a devtools tab, we just ignore this event.
-}
-
-void DevToolsTask::UpdateFavicon() {
-  // In the case of a devtools tab, we just ignore this event.
-}
-
 }  // namespace task_management