[DevTools] Expose DevToolsAgentHost for OOPIF, display it in chrome://inspect.

content/browser/devtools/devtools_agent_host_impl.h

Index: content/browser/devtools/devtools_agent_host_impl.h
diff --git a/content/browser/devtools/devtools_agent_host_impl.h b/content/browser/devtools/devtools_agent_host_impl.h
index 19b5c301f8df27ff1d5416376305b7e3b9e529dc..f48f42559aaa98699d40d82f36b7d04453e98d57 100644
--- a/content/browser/devtools/devtools_agent_host_impl.h
+++ b/content/browser/devtools/devtools_agent_host_impl.h
@@ -22,9 +22,6 @@ class BrowserContext;
 // Describes interface for managing devtools agents from the browser process.
 class CONTENT_EXPORT DevToolsAgentHostImpl : public DevToolsAgentHost {
  public:
-  // Returns a list of all existing WebContents that can be debugged.
-  static std::vector<WebContents*> GetInspectableWebContents();
-
   // Informs the hosted agent that a client host has attached.
   virtual void Attach() = 0;