Revert of [Sensors] Reland: Align sensor reading updates and 'onchange' notification with rAF.

third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js

Index: third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js
diff --git a/third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js b/third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js
index 236262f349f50d185ffa0fb3476e589cc635b794..262145feca1793baebf1d93189cdde29be69e497 100644
--- a/third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js
+++ b/third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js
@@ -41,7 +41,6 @@
         this.reporting_mode_ = reportingMode;
         this.sensor_reading_timer_id_ = null;
         this.update_reading_function_ = null;
-        this.reading_updates_count_ = 0;
         this.suspend_called_ = null;
         this.resume_called_ = null;
         this.add_configuration_called_ = null;
@@ -64,9 +63,6 @@
         return Promise.resolve({frequency: 5});
       }
 
-      reading_updates_count() {
-        return this.reading_updates_count_;
-      }
       // Adds configuration for the sensor and starts reporting fake data
       // through update_reading_function_ callback.
       addConfiguration(configuration) {
@@ -131,7 +127,6 @@
         this.stopReading();
 
         this.expects_modified_reading_ = false;
-        this.reading_updates_count_ = 0;
         this.start_should_fail_ = false;
         this.update_reading_function_ = null;
         this.active_sensor_configurations_ = [];
@@ -199,17 +194,13 @@
 
       startReading() {
         if (this.update_reading_function_ != null) {
-          this.stopReading();
           let max_frequency_used =
               this.active_sensor_configurations_[0].frequency;
           let timeout = (1 / max_frequency_used) * 1000;
           this.sensor_reading_timer_id_ = window.setInterval(() => {
-            if (this.update_reading_function_) {
+            if (this.update_reading_function_)
               this.update_reading_function_(this.buffer_,
-                                            this.expects_modified_reading_,
-                                            this.reading_updates_count_);
-              this.reading_updates_count_++;
-            }
+                                            this.expects_modified_reading_);
             if (this.reporting_mode_ === sensor.ReportingMode.ON_CHANGE) {
               this.client_.sensorReadingChanged();
             }