[sensors] Add Permission guard to the generic sensor apis.

third_party/WebKit/Source/modules/sensor/SensorProxy.h

 // 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.
 
 #ifndef SensorProxy_h
 #define SensorProxy_h
 
 #include "core/dom/ExceptionCode.h"
 #include "core/page/PageVisibilityObserver.h"
 #include "device/generic_sensor/public/cpp/sensor_reading.h"
 #include "device/generic_sensor/public/interfaces/sensor.mojom-blink.h"
 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
+#include "public/platform/modules/permissions/permission.mojom-blink.h"
+#include "public/platform/modules/permissions/permission_status.mojom-blink.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class SensorProviderProxy;
 class SensorReading;
 class SensorReadingUpdater;
+class SecurityOrigin;
 
 // This class wraps 'Sensor' mojo interface and used by multiple
 // JS sensor instances of the same type (within a single frame).
 class SensorProxy final : public GarbageCollectedFinalized<SensorProxy>,
                           public device::mojom::blink::SensorClient,
+                          public mojom::blink::PermissionObserver,
                           public PageVisibilityObserver {
   USING_GARBAGE_COLLECTED_MIXIN(SensorProxy);
   USING_PRE_FINALIZER(SensorProxy, Dispose);
   WTF_MAKE_NONCOPYABLE(SensorProxy);
 
  public:
   class Observer : public GarbageCollectedMixin {
    public:
     // Has valid 'Sensor' binding, {add, remove}Configuration()
     // methods can be called.
@@ skipping 58 matching lines @@
   const WTF::Vector<double>& FrequenciesUsed() const {
     return frequencies_used_;
   }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   friend class SensorProviderProxy;
   friend class SensorReadingUpdaterContinuous;
   friend class SensorReadingUpdaterOnChange;
-  SensorProxy(device::mojom::blink::SensorType, SensorProviderProxy*, Page*);
+  SensorProxy(device::mojom::blink::SensorType,
+              RefPtr<SecurityOrigin>,
+              SensorProviderProxy*,
+              Page*);
 
   // Updates sensor reading from shared buffer.
   void UpdateSensorReading();
   void NotifySensorChanged(double timestamp);
 
   // device::mojom::blink::SensorClient overrides.
   void RaiseError() override;
   void SensorReadingChanged() override;
 
   // PageVisibilityObserver overrides.
   void PageVisibilityChanged() override;
 
   // Generic handler for a fatal error.
   void HandleSensorError();
 
   // mojo call callbacks.
   void OnSensorCreated(device::mojom::blink::SensorInitParamsPtr,
                        device::mojom::blink::SensorClientRequest);
   void OnAddConfigurationCompleted(
       double frequency,
       std::unique_ptr<Function<void(bool)>> callback,
       bool result);
   void OnRemoveConfigurationCompleted(double frequency, bool result);
 
   bool TryReadFromBuffer(device::SensorReading& result);
   void OnAnimationFrame(double timestamp);
 
+  // PermissionObserver override.
+  void OnPermissionStatusChange(mojom::blink::PermissionStatus);
+
   device::mojom::blink::SensorType type_;
   device::mojom::blink::ReportingMode mode_;
   Member<SensorProviderProxy> provider_;
+
   using ObserversSet = HeapHashSet<WeakMember<Observer>>;
   ObserversSet observers_;
 
   device::mojom::blink::SensorPtr sensor_;
   device::mojom::blink::SensorConfigurationPtr default_config_;
   mojo::Binding<device::mojom::blink::SensorClient> client_binding_;
 
   enum State { kUninitialized, kInitializing, kInitialized };
   State state_;
   mojo::ScopedSharedBufferHandle shared_buffer_handle_;
   mojo::ScopedSharedBufferMapping shared_buffer_;
   bool suspended_;
   device::SensorReading reading_;
   std::pair<double, double> frequency_limits_;
 
   Member<SensorReadingUpdater> reading_updater_;
   WTF::Vector<double> frequencies_used_;
   double last_raf_timestamp_;
 
   using ReadingBuffer = device::SensorReadingSharedBuffer;
   static_assert(
       sizeof(ReadingBuffer) ==
           device::mojom::blink::SensorInitParams::kReadBufferSizeForTests,
       "Check reading buffer size for tests");
+
+  RefPtr<SecurityOrigin> security_origin_;
+  mojo::Binding<mojom::blink::PermissionObserver> binding_;
+  bool permission_subscribed_;
 };
 
 }  // namespace blink
 
 #endif  // SensorProxy_h