[sensors][permission] Add new permission types in permission module.

third_party/WebKit/Source/modules/permissions/Permissions.cpp

 // Copyright 2014 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/permissions/Permissions.h"
 
 #include <memory>
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/Nullable.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/modules/v8/V8MidiPermissionDescriptor.h"
 #include "bindings/modules/v8/V8PermissionDescriptor.h"
 #include "bindings/modules/v8/V8PushPermissionDescriptor.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/UserGestureIndicator.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/permissions/PermissionDescriptor.h"
 #include "modules/permissions/PermissionStatus.h"
 #include "modules/permissions/PermissionUtils.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/wtf/Functional.h"
 #include "platform/wtf/NotFound.h"
 #include "platform/wtf/PtrUtil.h"
 #include "platform/wtf/Vector.h"
 #include "public/platform/Platform.h"
 
 namespace blink {
 
 using mojom::blink::PermissionDescriptorPtr;
 using mojom::blink::PermissionName;
@@ skipping 50 matching lines @@
   }
   if (name == "midi") {
     MidiPermissionDescriptor midi_permission =
         NativeValueTraits<MidiPermissionDescriptor>::NativeValue(
             script_state->GetIsolate(), raw_permission.V8Value(),
             exception_state);
     return CreateMidiPermissionDescriptor(midi_permission.sysex());
   }
   if (name == "background-sync")
     return CreatePermissionDescriptor(PermissionName::BACKGROUND_SYNC);
+  // TODO(riju): Remove runtime flag check when Generic Sensor feature is
+  // stable.
+  if (name == "ambient-light-sensor" || name == "accelerometer" ||
+      name == "gyroscope" || name == "magnetometer") {
+    if (!RuntimeEnabledFeatures::SensorEnabled()) {
+      exception_state.ThrowTypeError("GenericSensor flag is not enabled.");
+      return nullptr;
+    }
+    return CreatePermissionDescriptor(PermissionName::SENSORS);
+  }
 
   return nullptr;
 }
 
 }  // anonymous namespace
 
 ScriptPromise Permissions::query(ScriptState* script_state,
                                  const Dictionary& raw_permission) {
   ExceptionState exception_state(script_state->GetIsolate(),
                                  ExceptionState::kGetterContext, "Permissions",
@@ skipping 195 matching lines @@
   result.ReserveInitialCapacity(caller_index_to_internal_index.size());
   for (int internal_index : caller_index_to_internal_index) {
     result.push_back(PermissionStatus::CreateAndListen(
         resolver->GetExecutionContext(), results[internal_index],
         descriptors[internal_index]->Clone()));
   }
   resolver->Resolve(result);
 }
 
 }  // namespace blink