Add autotest API for launching an app from the launcher

BUG=chromium:849438
TEST=tast run vm.CrostiniStartEverything

Change-Id: I51963c9f4fe7b5aa9fd42e2c040410a974376f58
Reviewed-on: https://chromium-review.googlesource.com/1235199Reviewed-by: Ben Wells <benwells@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Commit-Queue: Jeffrey Kardatzke <jkardatzke@google.com>
Cr-Commit-Position: refs/heads/master@{#592972}

chrome/browser/extensions/api/autotest_private/autotest_private_api.cc

@@ -56,6 +56,7 @@
 #include "net/base/filename_util.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "ui/base/ui_base_features.h"
+#include "ui/display/screen.h"
 #include "ui/message_center/public/cpp/notification.h"
 #endif
 
@@ -715,6 +716,28 @@ ExtensionFunction::ResponseAction AutotestPrivateIsAppShownFunction::Run() {
 #endif
 }
 
+AutotestPrivateLaunchAppFunction::~AutotestPrivateLaunchAppFunction() = default;
+
+ExtensionFunction::ResponseAction AutotestPrivateLaunchAppFunction::Run() {
+  DVLOG(1) << "AutotestPrivateLaunchAppFunction";
+#if defined(OS_CHROMEOS)
+  std::unique_ptr<api::autotest_private::LaunchApp::Params> params(
+      api::autotest_private::LaunchApp::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params);
+  ChromeLauncherController* const controller =
+      ChromeLauncherController::instance();
+  if (!controller)
+    return RespondNow(Error("Controller not available"));
+  controller->LaunchApp(ash::ShelfID(params->app_id),
+                        ash::ShelfLaunchSource::LAUNCH_FROM_APP_LIST,
+                        0, /* event_flags */
+                        display::Screen::GetScreen()->GetPrimaryDisplay().id());
+  return RespondNow(NoArguments());
+#else
+  return RespondNow(Error(kOnlyAvailableOnChromeOSError));
+#endif
+}
+
 AutotestPrivateSetCrostiniEnabledFunction::
     ~AutotestPrivateSetCrostiniEnabledFunction() = default;
 

chrome/browser/extensions/api/autotest_private/autotest_private_api.h

@@ -251,6 +251,16 @@ class AutotestPrivateIsAppShownFunction : public UIThreadExtensionFunction {
   ResponseAction Run() override;
 };
 
+class AutotestPrivateLaunchAppFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("autotestPrivate.launchApp",
+                             AUTOTESTPRIVATE_LAUNCHAPP)
+
+ private:
+  ~AutotestPrivateLaunchAppFunction() override;
+  ResponseAction Run() override;
+};
+
 class AutotestPrivateSetCrostiniEnabledFunction
     : public UIThreadExtensionFunction {
  public:

chrome/common/extensions/api/autotest_private.idl

@@ -171,6 +171,9 @@ namespace autotestPrivate {
     // Returns true if requested app is shown in Chrome.
     static void isAppShown(DOMString appId, IsAppShownCallback callback);
 
+    // Launches an application from the launcher with the given appId.
+    static void launchApp(DOMString appId, VoidCallback callback);
+
     // Update printer. Printer with empty ID is considered new.
     static void updatePrinter(Printer printer);
 

chrome/test/data/extensions/api_test/autotest_private/test.js

@@ -169,6 +169,14 @@ chrome.test.runTests([
             });
         });
   },
+  // This launches Chrome.
+  function launchApp() {
+    chrome.autotestPrivate.launchApp('mgndgikekgjfcpckkfioiadnlibdjbkf',
+      function() {
+        chrome.test.assertNoLastError();
+        chrome.test.succeed();
+      });
+  },
   function setCrostiniEnabled() {
     chrome.autotestPrivate.setCrostiniEnabled(true, chrome.test.callbackFail(
         'Crostini is not available for the current user'));

extensions/browser/extension_function_histogram_value.h

@@ -1340,6 +1340,7 @@ enum HistogramValue {
   WEBVIEWINTERNAL_ISSPATIALNAVIGATIONENABLED = 1277,
   FILEMANAGERPRIVATEINTERNAL_GETTHUMBNAIL = 1278,
   FILEMANAGERPRIVATEINTERNAL_GETCROSTINISHAREDPATHS = 1279,
+  AUTOTESTPRIVATE_LAUNCHAPP = 1280,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY

tools/metrics/histograms/enums.xml

@@ -16837,6 +16837,7 @@ Called by update_net_error_codes.py.-->
   <int value="1277" label="WEBVIEWINTERNAL_ISSPATIALNAVIGATIONENABLED"/>
   <int value="1278" label="FILEMANAGERPRIVATEINTERNAL_GETTHUMBNAIL"/>
   <int value="1279" label="FILEMANAGERPRIVATEINTERNAL_GETCROSTINISHAREDPATHS"/>
+  <int value="1280" label="AUTOTESTPRIVATE_LAUNCHAPP"/>
 </enum>
 
 <enum name="ExtensionIconState">