DevTools: extract bindings from ShellDevToolsFrontend

content/shell/browser/layout_test/blink_test_controller.h

Index: content/shell/browser/layout_test/blink_test_controller.h
diff --git a/content/shell/browser/layout_test/blink_test_controller.h b/content/shell/browser/layout_test/blink_test_controller.h
index 39ff4fd6c89d98ae68aee529ebdc3175d298c7ae..7e51a2f6c8851d4dac913b1d0f967eaba1f3a87c 100644
--- a/content/shell/browser/layout_test/blink_test_controller.h
+++ b/content/shell/browser/layout_test/blink_test_controller.h
@@ -39,7 +39,7 @@ class SkBitmap;
 namespace content {
 
 class LayoutTestBluetoothChooserFactory;
-class LayoutTestDevToolsFrontend;
+class LayoutTestDevToolsBindings;
 class RenderFrameHost;
 class RenderProcessHost;
 class Shell;
@@ -232,6 +232,9 @@ class BlinkTestController : public base::NonThreadSafe,
   base::FilePath temp_path_;
 
   Shell* main_window_;
+  std::unique_ptr<Shell> devtools_window_;
+
+  std::unique_ptr<LayoutTestDevToolsBindings> devtools_bindings_;
 
   // The PID of the render process of the render view host of main_window_.
   int current_pid_;
@@ -268,8 +271,6 @@ class BlinkTestController : public base::NonThreadSafe,
   const bool is_leak_detection_enabled_;
   bool crash_when_leak_found_;
 
-  LayoutTestDevToolsFrontend* devtools_frontend_;
-
   std::unique_ptr<LayoutTestBluetoothChooserFactory> bluetooth_chooser_factory_;
 
   // Map from frame_tree_node_id into frame-specific dumps.