Add a histogram for tracking web store promo

Creates an enumeration histogram called Extensions.AppsPromo with the following buckets:
0: launched an application from the promo
1: launched the web store from the promo
2: manually closed the promo (and uninstalled the applications)
3: promo expired

BUG=61017
TEST=

Review URL: http://codereview.chromium.org/4708002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@66006 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 107 insertions, 47 deletions

diff --git a/chrome/browser/dom_ui/app_launcher_handler.cc b/chrome/browser/dom_ui/app_launcher_handler.cc
index 9bc27d2..f550525 100644
--- a/chrome/browser/dom_ui/app_launcher_handler.cc
+++ b/chrome/browser/dom_ui/app_launcher_handler.cc
@@ -5,7 +5,9 @@
 #include "chrome/browser/dom_ui/app_launcher_handler.h"
 
 #include "app/animation.h"
+#include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
+#include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ -32,6 +34,11 @@
 
 namespace {
 
+// The URL prefixes used by the NTP to signal when the web store or an app
+// has launched. These are used for histogram purposes.
+const char* kLaunchAppPingURL = "record-app-launch";
+const char* kLaunchWebStorePingURL = "record-webstore-launch";
+
 // This extracts an int from a ListValue at the given |index|.
 bool ExtractInt(const ListValue* list, size_t index, int* out_int) {
   std::string string_value;
@@ -53,14 +60,67 @@ std::string GetIconURL(const Extension* extension, Extension::Icons icon,
     return default_val;
 }
 
+// Extracts the promo parameter from the |path| generated by a ping on the NTP.
+bool IsPromoActive(const std::string& path) {
+  std::vector<std::string> params;
+  base::SplitString(path, '+', &params);
+
+  CHECK(params.size() == 2);
+
+  return params.at(1) == "true";
+}
+
 }  // namespace
 
 AppLauncherHandler::AppLauncherHandler(ExtensionsService* extension_service)
-    : extensions_service_(extension_service) {
+    : extensions_service_(extension_service),
+      promo_active_(false) {
 }
 
 AppLauncherHandler::~AppLauncherHandler() {}
 
+// static
+void AppLauncherHandler::CreateAppInfo(const Extension* extension,
+                                       ExtensionPrefs* extension_prefs,
+                                       DictionaryValue* value) {
+  value->Clear();
+  value->SetString("id", extension->id());
+  value->SetString("name", extension->name());
+  value->SetString("description", extension->description());
+  value->SetString("launch_url", extension->GetFullLaunchURL().spec());
+  value->SetString("options_url", extension->options_url().spec());
+  value->SetString("icon_big", GetIconURL(
+      extension, Extension::EXTENSION_ICON_LARGE,
+      "chrome://theme/IDR_APP_DEFAULT_ICON"));
+  value->SetString("icon_small", GetIconURL(
+      extension, Extension::EXTENSION_ICON_BITTY,
+      std::string("chrome://favicon/") + extension->GetFullLaunchURL().spec()));
+  value->SetInteger("launch_container", extension->launch_container());
+  value->SetInteger("launch_type",
+      extension_prefs->GetLaunchType(extension->id()));
+
+  int app_launch_index = extension_prefs->GetAppLaunchIndex(extension->id());
+  if (app_launch_index == -1) {
+    // Make sure every app has a launch index (some predate the launch index).
+    app_launch_index = extension_prefs->GetNextAppLaunchIndex();
+    extension_prefs->SetAppLaunchIndex(extension->id(), app_launch_index);
+  }
+  value->SetInteger("app_launch_index", app_launch_index);
+}
+
+// static
+bool AppLauncherHandler::HandlePing(const std::string& path) {
+  if (path.find(kLaunchWebStorePingURL) != std::string::npos) {
+    RecordWebStoreLaunch(IsPromoActive(path));
+    return true;
+  } else if (path.find(kLaunchAppPingURL) != std::string::npos) {
+    RecordAppLaunch(IsPromoActive(path));
+    return true;
+  }
+
+  return false;
+}
+
 DOMMessageHandler* AppLauncherHandler::Attach(DOMUI* dom_ui) {
   // TODO(arv): Add initialization code to the Apps store etc.
   return DOMMessageHandler::Attach(dom_ui);
@@ -102,35 +162,6 @@ void AppLauncherHandler::Observe(NotificationType type,
   }
 }
 
-// static
-void AppLauncherHandler::CreateAppInfo(const Extension* extension,
-                                       ExtensionPrefs* extension_prefs,
-                                       DictionaryValue* value) {
-  value->Clear();
-  value->SetString("id", extension->id());
-  value->SetString("name", extension->name());
-  value->SetString("description", extension->description());
-  value->SetString("launch_url", extension->GetFullLaunchURL().spec());
-  value->SetString("options_url", extension->options_url().spec());
-  value->SetString("icon_big", GetIconURL(
-      extension, Extension::EXTENSION_ICON_LARGE,
-      "chrome://theme/IDR_APP_DEFAULT_ICON"));
-  value->SetString("icon_small", GetIconURL(
-      extension, Extension::EXTENSION_ICON_BITTY,
-      std::string("chrome://favicon/") + extension->GetFullLaunchURL().spec()));
-  value->SetInteger("launch_container", extension->launch_container());
-  value->SetInteger("launch_type",
-      extension_prefs->GetLaunchType(extension->id()));
-
-  int app_launch_index = extension_prefs->GetAppLaunchIndex(extension->id());
-  if (app_launch_index == -1) {
-    // Make sure every app has a launch index (some predate the launch index).
-    app_launch_index = extension_prefs->GetNextAppLaunchIndex();
-    extension_prefs->SetAppLaunchIndex(extension->id(), app_launch_index);
-  }
-  value->SetInteger("app_launch_index", app_launch_index);
-}
-
 void AppLauncherHandler::FillAppDictionary(DictionaryValue* dictionary) {
   ListValue* list = new ListValue();
   const ExtensionList* extensions = extensions_service_->extensions();
@@ -150,8 +181,10 @@ void AppLauncherHandler::FillAppDictionary(DictionaryValue* dictionary) {
   if (default_apps->ShouldShowPromo(extensions_service_->GetAppIds())) {
     dictionary->SetBoolean("showPromo", true);
     default_apps->DidShowPromo();
+    promo_active_ = true;
   } else {
     dictionary->SetBoolean("showPromo", false);
+    promo_active_ = false;
   }
 
   bool showLauncher =
@@ -220,6 +253,9 @@ void AppLauncherHandler::HandleLaunchApp(const ListValue* args) {
 
   if (new_contents != old_contents && browser->tab_count() > 1)
     browser->CloseTabContents(old_contents);
+
+  if (extension_id != extension_misc::kWebStoreAppId)
+    RecordAppLaunch(promo_active_);
 }
 
 void AppLauncherHandler::HandleSetLaunchType(const ListValue* args) {
@@ -240,19 +276,6 @@ void AppLauncherHandler::HandleSetLaunchType(const ListValue* args) {
       static_cast<ExtensionPrefs::LaunchType>(launch_type));
 }
 
-void AppLauncherHandler::AnimateAppIcon(const Extension* extension,
-                                        const gfx::Rect& rect) {
-  // We make this check for the case of minimized windows, unit tests, etc.
-  if (platform_util::IsVisible(dom_ui_->tab_contents()->GetNativeView()) &&
-      Animation::ShouldRenderRichAnimation()) {
-#if defined(OS_WIN)
-    AppLaunchedAnimation::Show(extension, rect);
-#else
-    NOTIMPLEMENTED();
-#endif
-  }
-}
-
 void AppLauncherHandler::HandleUninstallApp(const ListValue* args) {
   std::string extension_id = WideToUTF8(ExtractStringValue(args));
   const Extension* extension = extensions_service_->GetExtensionById(
@@ -271,6 +294,9 @@ void AppLauncherHandler::HandleHideAppsPromo(const ListValue* args) {
   // If the user has intentionally hidden the promotion, we'll uninstall all the
   // default apps (we know the user hasn't installed any apps on their own at
   // this point, or the promotion wouldn't have been shown).
+  UMA_HISTOGRAM_ENUMERATION(extension_misc::kAppsPromoHistogram,
+                            extension_misc::PROMO_CLOSE,
+                            extension_misc::PROMO_BUCKET_BOUNDARY);
   DefaultApps* default_apps = extensions_service_->default_apps();
   const ExtensionIdSet* app_ids = default_apps->GetDefaultApps();
   DCHECK(*app_ids == extensions_service_->GetAppIds());
@@ -284,10 +310,25 @@ void AppLauncherHandler::HandleHideAppsPromo(const ListValue* args) {
   extensions_service_->default_apps()->SetPromoHidden();
 }
 
-ExtensionInstallUI* AppLauncherHandler::GetExtensionInstallUI() {
-  if (!install_ui_.get())
-    install_ui_.reset(new ExtensionInstallUI(dom_ui_->GetProfile()));
-  return install_ui_.get();
+//static
+void AppLauncherHandler::RecordWebStoreLaunch(bool promo_active) {
+  if (!promo_active) return;
+
+  UMA_HISTOGRAM_ENUMERATION(extension_misc::kAppsPromoHistogram,
+                            extension_misc::PROMO_LAUNCH_WEB_STORE,
+                            extension_misc::PROMO_BUCKET_BOUNDARY);
+}
+
+//static
+void AppLauncherHandler::RecordAppLaunch(bool promo_active) {
+  // TODO(jstritar): record app launches that occur when the promo is not
+  // active using a different histogram.
+
+  if (!promo_active) return;
+
+  UMA_HISTOGRAM_ENUMERATION(extension_misc::kAppsPromoHistogram,
+                            extension_misc::PROMO_LAUNCH_APP,
+                            extension_misc::PROMO_BUCKET_BOUNDARY);
 }
 
 void AppLauncherHandler::InstallUIProceed() {
@@ -308,3 +349,22 @@ void AppLauncherHandler::InstallUIProceed() {
 void AppLauncherHandler::InstallUIAbort() {
   extension_id_prompting_ = "";
 }
+
+ExtensionInstallUI* AppLauncherHandler::GetExtensionInstallUI() {
+  if (!install_ui_.get())
+    install_ui_.reset(new ExtensionInstallUI(dom_ui_->GetProfile()));
+  return install_ui_.get();
+}
+
+void AppLauncherHandler::AnimateAppIcon(const Extension* extension,
+                                        const gfx::Rect& rect) {
+  // We make this check for the case of minimized windows, unit tests, etc.
+  if (platform_util::IsVisible(dom_ui_->tab_contents()->GetNativeView()) &&
+      Animation::ShouldRenderRichAnimation()) {
+#if defined(OS_WIN)
+    AppLaunchedAnimation::Show(extension, rect);
+#else
+    NOTIMPLEMENTED();
+#endif
+  }
+}