bluetooth: Suggest Origin Trial in console.

third_party/WebKit/Source/modules/bluetooth/Bluetooth.cpp

 // Copyright 2015 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 "modules/bluetooth/Bluetooth.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/inspector/ConsoleMessage.h"
+#include "core/origin_trials/OriginTrialContext.h"
+#include "core/origin_trials/OriginTrials.h"
 #include "modules/bluetooth/BluetoothDevice.h"
 #include "modules/bluetooth/BluetoothError.h"
 #include "modules/bluetooth/BluetoothSupplement.h"
 #include "modules/bluetooth/BluetoothUUID.h"
 #include "modules/bluetooth/RequestDeviceOptions.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/UserGestureIndicator.h"
 #include "public/platform/modules/bluetooth/WebBluetooth.h"
 #include "public/platform/modules/bluetooth/WebRequestDeviceOptions.h"
 
@@ skipping 101 matching lines @@
                 return;
             optionalServices.append(validatedOptionalService);
         }
         result.optionalServices.assign(optionalServices);
     }
 }
 
 // https://webbluetoothchrome.github.io/web-bluetooth/#dom-bluetooth-requestdevice
 ScriptPromise Bluetooth::requestDevice(ScriptState* scriptState, const RequestDeviceOptions& options, ExceptionState& exceptionState)
 {
-
     // By adding the "OriginTrialEnabled" extended binding, we enable the
     // requestDevice function on all platforms for websites that contain an
     // origin trial token. Since we only support Chrome OS, Android and MacOS
     // for this experiment we reject any promises from other platforms unless
     // they have the enable-web-bluetooth flag on.
 #if !OS(CHROMEOS) && !OS(ANDROID) && !OS(MACOSX)
     if (!RuntimeEnabledFeatures::webBluetoothEnabled()) {
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError, "Web Bluetooth is not enabled on this platform. To find out how to enable it and the current implementation status visit https://goo.gl/HKa2If"));
     }
 #endif
 
+    // Promote use of Origin Trials
+    // * When not being run on an origin trial.
+    // * Only once for the lifetime of this Bluetooth object, to avoid being
+    //   a nuisance and too verbose in the console. Reloading a page will reset
+    //   and the message can be shown again.
+    ExecutionContext* context = scriptState->getExecutionContext();
+    OriginTrialContext* originTrials = OriginTrialContext::from(context, OriginTrialContext::DontCreateIfNotExists);
+    bool originTrialActiveForThisPage = originTrials && originTrials->isFeatureEnabled("WebBluetooth");
+
+    if (!originTrialActiveForThisPage && !promotedOriginTrial) {
+        promotedOriginTrial = true;
+        context->addConsoleMessage(ConsoleMessage::create(JSMessageSource, InfoMessageLevel,
+            "Web Bluetooth is available as an Origin Trial: https://bit.ly/WebBluetoothOriginTrial"));
+    }
+
     // 1. If the incumbent settings object is not a secure context, reject promise with a SecurityError and abort these steps.
     String errorMessage;
-    if (!scriptState->getExecutionContext()->isSecureContext(errorMessage)) {
+    if (!context->isSecureContext(errorMessage)) {
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(SecurityError, errorMessage));
     }
 
     // 2. If the algorithm is not allowed to show a popup, reject promise with a SecurityError and abort these steps.
     if (!UserGestureIndicator::consumeUserGesture()) {
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(SecurityError, "Must be handling a user gesture to show a permission request."));
     }
 
     WebBluetooth* webbluetooth = BluetoothSupplement::fromScriptState(scriptState);
     if (!webbluetooth)
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
 
     // 3. In order to convert the arguments from service names and aliases to just UUIDs, do the following substeps:
     WebRequestDeviceOptions webOptions;
     convertRequestDeviceOptions(options, webOptions, exceptionState);
     if (exceptionState.hadException())
         return exceptionState.reject(scriptState);
 
     // Subsequent steps are handled in the browser process.
     ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
     webbluetooth->requestDevice(webOptions, new CallbackPromiseAdapter<BluetoothDevice, BluetoothError>(resolver));
     return promise;
 
 }
 
 } // namespace blink