sensors: Make Blink Mojo requests go through a new WebSensorProvider …

…interface

This is being done in preparation for adding the concept of "virtual
sensors" that implement the Automation section of the Generic Sensor
spec.

Virtual sensors manipulation is a privileged operation that should not
be exposed to Blink, so we now add a blink.mojom.WebSensorProvider
interface that it is supposed to use instead of
device.mojom.SensorProvider. FrameSensorProviderProxy in //content is
responsible for receiving WebSensorProvider requests and translating
them into SensorProvider ones that reach //services via
WebContentsSensorProviderProxy.

At the moment, both Mojo interfaces expose the same GetSensor() method,
but the idea is for SensorProvider to have extra virtual sensor methods
that WebSensorProvider will not.

Bug: 1278377
Change-Id: I96ea78f66cd6219cb46a49b90791dd17fde2d085
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4916233
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Emily Stark <estark@chromium.org>
Commit-Queue: Raphael Kubo Da Costa <raphael.kubo.da.costa@intel.com>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1206683}

resources/chromium/generic_sensor_mocks.js

@@ -1,5 +1,6 @@
 import {ReportingMode, Sensor, SensorClientRemote, SensorReceiver, SensorRemote, SensorType} from '/gen/services/device/public/mojom/sensor.mojom.m.js';
-import {SensorCreationResult, SensorInitParams_READ_BUFFER_SIZE_FOR_TESTS, SensorProvider, SensorProviderReceiver} from '/gen/services/device/public/mojom/sensor_provider.mojom.m.js';
+import {SensorCreationResult, SensorInitParams_READ_BUFFER_SIZE_FOR_TESTS} from '/gen/services/device/public/mojom/sensor_provider.mojom.m.js';
+import {WebSensorProvider, WebSensorProviderReceiver} from '/gen/third_party/blink/public/mojom/sensor/web_sensor_provider.mojom.m.js';
 
 // A "sliding window" that iterates over |data| and returns one item at a
 // time, advancing and wrapping around as needed. |data| must be an array of
@@ -287,8 +288,8 @@ self.GenericSensorTest = (() => {
     }
   }
 
-  // Class that mocks SensorProvider interface defined in
-  // https://cs.chromium.org/chromium/src/services/device/public/mojom/sensor_provider.mojom
+  // Class that mocks the WebSensorProvider interface defined in
+  // https://cs.chromium.org/chromium/src/third_party/blink/public/mojom/sensor/web_sensor_provider.mojom
   class MockSensorProvider {
     constructor() {
       this.readingSizeInBytes_ =
@@ -334,10 +335,10 @@ self.GenericSensorTest = (() => {
             SensorType.RELATIVE_ORIENTATION_EULER_ANGLES],
         ['ProximitySensor', SensorType.PROXIMITY]
       ]);
-      this.receiver_ = new SensorProviderReceiver(this);
+      this.receiver_ = new WebSensorProviderReceiver(this);
 
       this.interceptor_ =
-          new MojoInterfaceInterceptor(SensorProvider.$interfaceName);
+        new MojoInterfaceInterceptor(WebSensorProvider.$interfaceName);
       this.interceptor_.oninterfacerequest = e => {
         this.bindToPipe(e.handle);
       };