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

chrome/browser/devtools/devtools_window.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/devtools/devtools_window.h"
 
 #include <algorithm>
 
 #include "base/json/json_reader.h"
 #include "base/metrics/histogram.h"
@@ skipping 405 matching lines @@
 }
 
 // static
 DevToolsWindow* DevToolsWindow::OpenDevToolsWindow(
     content::WebContents* inspected_web_contents,
     const DevToolsToggleAction& action) {
   return ToggleDevToolsWindow(inspected_web_contents, true, action, "");
 }
 
 // static
+DevToolsWindow* DevToolsWindow::OpenDevToolsWindow(
+    Profile* profile,
+    const scoped_refptr<content::DevToolsAgentHost>& agent_host) {
+  DevToolsWindow* window = FindDevToolsWindow(agent_host.get());
+  if (!window) {
+    window = DevToolsWindow::Create(
+        profile, GURL(), nullptr, false, std::string(), false, std::string());
+    DCHECK(window);
+    window->bindings_->AttachTo(agent_host);
+  }
+  window->ScheduleShow(DevToolsToggleAction::Show());
+  return window;
+}
+
+// static
 DevToolsWindow* DevToolsWindow::ToggleDevToolsWindow(
     Browser* browser,
     const DevToolsToggleAction& action) {
   if (action.type() == DevToolsToggleAction::kToggle &&
       browser->is_devtools()) {
     browser->tab_strip_model()->CloseAllTabs();
     return NULL;
   }
 
   return ToggleDevToolsWindow(
@@ skipping 767 matching lines @@
       closure.Run();
     return;
   }
   load_completed_callback_ = closure;
 }
 
 bool DevToolsWindow::ForwardKeyboardEvent(
     const content::NativeWebKeyboardEvent& event) {
   return event_forwarder_->ForwardEvent(event);
 }