Diagnostics: Convert callbacks using .bind to arrow functions

Bug: 1125150
Test: browser_tests --gtest_filter=DiagnosticsApp*
Change-Id: Ic93a11bc58041721e14781f31d8f4b9bc590f9b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2544854Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Michael Checo <michaelcheco@google.com>
Cr-Commit-Position: refs/heads/master@{#829283}

chromeos/components/diagnostics_ui/resources/battery_status_card.js

@@ -87,16 +87,17 @@ Polymer({
 
   /** @private */
   fetchBatteryInfo_() {
-    this.systemDataProvider_.getBatteryInfo().then(
-        this.onBatteryInfoReceived_.bind(this));
+    this.systemDataProvider_.getBatteryInfo().then((result) => {
+      this.onBatteryInfoReceived_(result.batteryInfo);
+    });
   },
 
   /**
-   * @param {!{batteryInfo: !BatteryInfo}} result
+   * @param {!BatteryInfo} batteryInfo
    * @private
    */
-  onBatteryInfoReceived_(result) {
-    this.batteryInfo_ = result.batteryInfo;
+  onBatteryInfoReceived_(batteryInfo) {
+    this.batteryInfo_ = batteryInfo;
   },
 
   /** @private */

chromeos/components/diagnostics_ui/resources/diagnostics_app.js

@@ -50,17 +50,17 @@ Polymer({
 
   /** @private */
   fetchSystemInfo_() {
-    this.systemDataProvider_.getSystemInfo().then(
-        this.onSystemInfoReceived_.bind(this));
+    this.systemDataProvider_.getSystemInfo().then((result) => {
+      this.onSystemInfoReceived_(result.systemInfo);
+    });
   },
 
   /**
-   * @param {{systemInfo: !SystemInfo}} result
+   * @param {!SystemInfo} systemInfo
    * @private
    */
-  onSystemInfoReceived_(result) {
-    this.showBatteryStatusCard_ =
-        result.systemInfo.deviceCapabilities.hasBattery;
+  onSystemInfoReceived_(systemInfo) {
+    this.showBatteryStatusCard_ = systemInfo.deviceCapabilities.hasBattery;
   },
 
 });
\ No newline at end of file

chromeos/components/diagnostics_ui/resources/overview_card.js

@@ -41,16 +41,16 @@ Polymer({
 
   /** @private */
   fetchSystemInfo_() {
-    this.systemDataProvider_.getSystemInfo().then(
-        this.onSystemInfoReceived_.bind(this));
+    this.systemDataProvider_.getSystemInfo().then((result) => {
+      this.onSystemInfoReceived_(result.systemInfo);
+    });
   },
 
   /**
-   * @param {!{systemInfo: !SystemInfo}} result
+   * @param {!SystemInfo} systemInfo
    * @private
    */
-  onSystemInfoReceived_(result) {
-    this.systemInfo_ = result.systemInfo;
+  onSystemInfoReceived_(systemInfo) {
+    this.systemInfo_ = systemInfo;
   },
-
 });