Add chrome://slow for enabling performance tracing for feedback reports.

chrome/browser/ui/webui/chromeos/slow_ui.cc

Index: chrome/browser/ui/webui/chromeos/slow_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/slow_ui.cc b/chrome/browser/ui/webui/chromeos/slow_ui.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c9aaffaa7b3093bc8c85da81688393aafda5681
--- /dev/null
+++ b/chrome/browser/ui/webui/chromeos/slow_ui.cc
@@ -0,0 +1,180 @@
+// Copyright (c) 2013 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/chromeos/slow_ui.h"
+
+#include <string>
+
+#include "base/bind.h"
+#include "base/prefs/pref_change_registrar.h"
+#include "base/prefs/pref_service.h"
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/url_data_source.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_message_handler.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/webui/jstemplate_builder.h"
+#include "ui/webui/web_ui_util.h"
+
+using content::WebUIMessageHandler;
+
+namespace {
+
+// JS API callbacks names.
+const char kJsApiDisableTracing[] = "disableTracing";
+const char kJsApiEnableTracing[] = "enableTracing";
+const char kJsApiLoadComplete[] = "loadComplete";
+
+// Page JS API function names.
+const char kJsApiTracingPrefChanged[] = "options.Slow.tracingPrefChanged";
+
+}  // namespace
+
+namespace chromeos {
+
+class SlowUIHTMLSource : public content::URLDataSource {
+ public:
+  SlowUIHTMLSource();
+
+  // content::URLDataSource implementation.
+  virtual std::string GetSource() const OVERRIDE;
+  virtual void StartDataRequest(
+      const std::string& path,
+      int render_process_id,
+      int render_view_id,
+      const content::URLDataSource::GotDataCallback& callback) OVERRIDE;
+  virtual std::string GetMimeType(const std::string&) const OVERRIDE {
+    return "text/html";
+  }
+  virtual bool ShouldAddContentSecurityPolicy() const OVERRIDE {
+    return false;
+  }
+
+ private:
+  virtual ~SlowUIHTMLSource() {}
+
+  DISALLOW_COPY_AND_ASSIGN(SlowUIHTMLSource);
+};
+
+// The handler for Javascript messages related to the "slow" view.
+class SlowHandler : public WebUIMessageHandler {
+ public:
+  explicit SlowHandler(Profile* profile);
+  virtual ~SlowHandler();
+
+  // WebUIMessageHandler implementation.
+  virtual void RegisterMessages() OVERRIDE;
+
+ private:
+  void UpdatePage();
+
+  // Handlers for JS WebUI messages.
+  void HandleDisable(const ListValue* args);
+  void HandleEnable(const ListValue* args);
+  void LoadComplete(const ListValue* args);
+
+  Profile* profile_;
+  scoped_ptr<PrefChangeRegistrar> user_pref_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(SlowHandler);
+};
+
+// SlowUIHTMLSource -------------------------------------------------------
+
+SlowUIHTMLSource::SlowUIHTMLSource() {
+}
+
+std::string SlowUIHTMLSource::GetSource() const {
+  return chrome::kChromeUISlowHost;
+}
+
+void SlowUIHTMLSource::StartDataRequest(
+    const std::string& path,
+    int render_process_id,
+    int render_view_id,
+    const content::URLDataSource::GotDataCallback& callback) {
+  DictionaryValue strings;
+  strings.SetString("slowDisable", l10n_util::GetStringUTF16(IDS_SLOW_DISABLE));
+  strings.SetString("slowEnable", l10n_util::GetStringUTF16(IDS_SLOW_ENABLE));
+  strings.SetString("slowDescription",
+      l10n_util::GetStringUTF16(IDS_SLOW_DESCRIPTION));
+  strings.SetString("slowWarning",
+      l10n_util::GetStringUTF16(IDS_SLOW_WARNING));
+
+  webui::SetFontAndTextDirection(&strings);
+
+  static const base::StringPiece html(
+      ResourceBundle::GetSharedInstance().GetRawDataResource(IDR_SLOW_HTML));
+
+  std::string full_html = webui::GetI18nTemplateHtml(html, &strings);
+
+  callback.Run(base::RefCountedString::TakeString(&full_html));
+}
+
+// SlowHandler ------------------------------------------------------------
+
+SlowHandler::SlowHandler(Profile* profile) : profile_(profile) {
+}
+
+SlowHandler::~SlowHandler() {
+}
+
+void SlowHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(kJsApiDisableTracing,
+      base::Bind(&SlowHandler::HandleDisable, base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(kJsApiEnableTracing,
+      base::Bind(&SlowHandler::HandleEnable, base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(kJsApiLoadComplete,
+      base::Bind(&SlowHandler::LoadComplete, base::Unretained(this)));
+
+  user_pref_registrar_.reset(new PrefChangeRegistrar);
+  user_pref_registrar_->Init(profile_->GetPrefs());
+  user_pref_registrar_->Add(prefs::kPerformanceTracingEnabled,
+                            base::Bind(&SlowHandler::UpdatePage,
+                                       base::Unretained(this)));
+}
+
+void SlowHandler::HandleDisable(const ListValue* args) {
+  PrefService* pref_service = profile_->GetPrefs();
+  pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, false);
+}
+
+void SlowHandler::HandleEnable(const ListValue* args) {
+  PrefService* pref_service = profile_->GetPrefs();
+  pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, true);
+}
+
+void SlowHandler::LoadComplete(const ListValue* args) {
+  UpdatePage();
+}
+
+void SlowHandler::UpdatePage() {
+  PrefService* pref_service = profile_->GetPrefs();
+  bool enabled = pref_service->GetBoolean(prefs::kPerformanceTracingEnabled);
+  base::FundamentalValue pref_value(enabled);
+  web_ui()->CallJavascriptFunction(kJsApiTracingPrefChanged, pref_value);
+}
+
+// SlowUI -----------------------------------------------------------------
+
+SlowUI::SlowUI(content::WebUI* web_ui) : WebUIController(web_ui) {
+  Profile* profile = Profile::FromWebUI(web_ui);
+
+  SlowHandler* handler = new SlowHandler(profile);
+  web_ui->AddMessageHandler(handler);
+  SlowUIHTMLSource* html_source = new SlowUIHTMLSource();
+
+  // Set up the chrome://slow/ source.
+  content::URLDataSource::Add(profile, html_source);
+}
+
+}  // namespace chromeos
+