Add InspectableWebContents

This class can be used to create a content::WebContents that can be inspected
by the Chrome Dev Tools. This requires embedding applications to copy
content_shell.pak into their resource bundle.

Right now the dev tools are always docked to the bottom of the view; we don't
yet support undocking or changing the docked side.

Fixes #1.

brightray/browser/devtools_delegate.cc

@@ -0,0 +1,39 @@
+// 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-CHROMIUM file.
+
+#include "devtools_delegate.h"
+
+namespace brightray {
+
+DevToolsDelegate::DevToolsDelegate() {
+}
+
+DevToolsDelegate::~DevToolsDelegate() {
+}
+
+std::string DevToolsDelegate::GetDiscoveryPageHTML() {
+  return std::string();
+}
+
+bool DevToolsDelegate::BundlesFrontendResources() {
+  return true;
+}
+
+base::FilePath DevToolsDelegate::GetDebugFrontendDir() {
+  return base::FilePath();
+}
+
+std::string DevToolsDelegate::GetPageThumbnailData(const GURL&) {
+  return std::string();
+}
+
+content::RenderViewHost* DevToolsDelegate::CreateNewTarget() {
+  return nullptr;
+}
+
+content::DevToolsHttpHandlerDelegate::TargetType DevToolsDelegate::GetTargetType(content::RenderViewHost*) {
+  return kTargetTypeTab;
+}
+
+}