Add a kill switch for all of Web Bluetooth.

chrome/browser/web_bluetooth_browsertest.cc

+// Copyright 2016 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.
+
+// This file contains browsertests for Web Bluetooth that depend on behavior
+// defined in chrome/, not just in content/.
+
+#include "base/command_line.h"
+#include "base/metrics/field_trial.h"
+#include "chrome/browser/permissions/permission_context_base.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "components/variations/variations_associated_data.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/test/browser_test_utils.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+#include "device/bluetooth/test/mock_bluetooth_adapter.h"
+
+namespace {
+
+class WebBluetoothTest : public InProcessBrowserTest {
+ protected:
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    // This is needed while Web Bluetooth is an Origin Trial, but can go away
+    // once it ships globally.
+    command_line->AppendSwitch(switches::kEnableWebBluetooth);
+    InProcessBrowserTest::SetUpCommandLine(command_line);
+  }
+
+  void SetUpOnMainThread() override {
+    // Navigate to a secure context.
+    embedded_test_server()->ServeFilesFromSourceDirectory("content/test/data");
+    ASSERT_TRUE(embedded_test_server()->Start());
+    ui_test_utils::NavigateToURL(
+        browser(),
+        embedded_test_server()->GetURL("localhost", "/simple_page.html"));
+    web_contents_ = browser()->tab_strip_model()->GetActiveWebContents();
+    EXPECT_THAT(
+        web_contents_->GetMainFrame()->GetLastCommittedOrigin().Serialize(),
+        testing::StartsWith("http://localhost:"));
+  }
+
+  content::WebContents* web_contents_ = nullptr;
+};
+
+IN_PROC_BROWSER_TEST_F(WebBluetoothTest, KillSwitchShouldBlock) {
+  // Fake the BluetoothAdapter to say it's present.
+  scoped_refptr<device::MockBluetoothAdapter> adapter =
+      new testing::NiceMock<device::MockBluetoothAdapter>;
+  EXPECT_CALL(*adapter, IsPresent()).WillRepeatedly(testing::Return(true));
+  device::BluetoothAdapterFactory::SetAdapterForTesting(adapter);
+
+  // Turn on the global kill switch.

[kcarattini, 2016/03/30 00:45:59]

Can you also test that it works properly without the kill switch on?

[Jeffrey Yasskin, 2016/03/30 01:19:51]

We test that in
https://code.google.com/p/chromium/codesearch/#chromium/src/third_party/WebKi....
I agree it'd be nice to have this test cover the success case too, but we'd need
to drive the chooser dialog from the test, which either implies subclassing
Browser or writing code to click buttons. The layout tests do it by customizing
Shell, which we don't have access to in a browsertest.

+  std::map<std::string, std::string> params;
+  params["Bluetooth"] =
+      PermissionContextBase::kPermissionsKillSwitchBlockedValue;
+  variations::AssociateVariationParams(
+      PermissionContextBase::kPermissionsKillSwitchFieldStudy, "TestGroup",
+      params);
+  base::FieldTrialList::CreateFieldTrial(
+      PermissionContextBase::kPermissionsKillSwitchFieldStudy, "TestGroup");
+
+  std::string rejection;
+  EXPECT_TRUE(content::ExecuteScriptAndExtractString(
+      web_contents_,
+      "navigator.bluetooth.requestDevice({filters: [{name: 'Hello'}]})"
+      "  .then(() => { domAutomationController.send('Success'); },"
+      "        reason => {"
+      "      domAutomationController.send(reason.name + ': ' + reason.message);"
+      "  });",
+      &rejection));
+  EXPECT_THAT(rejection,
+              testing::MatchesRegex("NotFoundError: .*globally disabled.*"));
+}
+
+}  // namespace