Load devtools files from resources.pak rather than from disk take 2.

chrome/browser/ui/webui/devtools_ui.cc

 // Copyright (c) 2011 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/ui/webui/devtools_ui.h"
 
+#include "base/string_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
 #include "chrome/common/render_messages.h"
+#include "chrome/common/url_constants.h"
 #include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "grit/devtools_resources_map.h"
+#include "ui/base/resource/resource_bundle.h"
+
+namespace {
+
+std::string PathWithoutParams(const std::string& path) {
+  return GURL(std::string("chrome-devtools://devtools/") + path)
+      .path().substr(1);
+}
+
+}
+
+class DevToolsDataSource : public ChromeURLDataManager::DataSource {
+ public:
+  DevToolsDataSource();
+
+  virtual void StartDataRequest(const std::string& path,
+                                bool is_off_the_record,
+                                int request_id);
+  virtual std::string GetMimeType(const std::string& path) const;
+
+ private:
+  ~DevToolsDataSource() {}
+  DISALLOW_COPY_AND_ASSIGN(DevToolsDataSource);
+};
+
+
+DevToolsDataSource::DevToolsDataSource()
+    : DataSource(chrome::kChromeUIDevToolsHost, MessageLoop::current()) {
+}
+
+void DevToolsDataSource::StartDataRequest(const std::string& path,
+                                          bool is_off_the_record,
+                                          int request_id) {
+  std::string filename = PathWithoutParams(path);
+
+  int resource_id = -1;
+  for (size_t i = 0; i < kDevtoolsResourcesSize; ++i) {
+    if (filename == kDevtoolsResources[i].name) {
+      resource_id = kDevtoolsResources[i].value;
+      break;
+    }
+  }
+
+  DLOG_IF(WARNING, -1 == resource_id) << "Unable to find dev tool resource: "
+      << filename << ". If you compiled with debug_devtools=1, try running"
+      " with --debug-devtools.";
+  const ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  scoped_refptr<RefCountedStaticMemory> bytes(rb.LoadDataResourceBytes(
+      resource_id));
+  SendResponse(request_id, bytes);
+}
+
+std::string DevToolsDataSource::GetMimeType(const std::string& path) const {
+  std::string filename = PathWithoutParams(path);
+  if (EndsWith(filename, ".html", false)) {
+    return "text/html";
+  } else if (EndsWith(filename, ".css", false)) {
+    return "text/css";
+  } else if (EndsWith(filename, ".js", false)) {
+    return "application/javascript";
+  } else if (EndsWith(filename, ".png", false)) {
+    return "image/png";
+  } else if (EndsWith(filename, ".gif", false)) {
+    return "image/gif";
+  }
+  NOTREACHED();
+  return "text/plain";
+}
+
 
 DevToolsUI::DevToolsUI(TabContents* contents) : WebUI(contents) {
+  DevToolsDataSource* data_source = new DevToolsDataSource();
+  contents->profile()->GetChromeURLDataManager()->AddDataSource(data_source);
 }
 
 void DevToolsUI::RenderViewCreated(RenderViewHost* render_view_host) {
   render_view_host->Send(new ViewMsg_SetupDevToolsClient(
       render_view_host->routing_id()));
 }