MD Extensions: Convert all usages of .bind(this) to use ES6 arrow function.

Bug: 747596
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Iec0f19f471edbf80309071baacd96d7bf8351ef1
Reviewed-on: https://chromium-review.googlesource.com/585846
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490113}

.eslintrc.js

@@ -21,7 +21,6 @@ module.exports = {
       },
     ],
     'semi': ['error', 'always'],
-    'arrow-parens': ['error', 'always'],
 
     // TODO(dpapad): Add more checks according to our styleguide.
   },

chrome/browser/resources/md_extensions/drop_overlay.js

@@ -12,12 +12,12 @@ Polymer({
     var dragTarget = document.documentElement;
     this.dragWrapperHandler_ =
         new extensions.DragAndDropHandler(true, dragTarget);
-    dragTarget.addEventListener('extension-drag-started', function() {
+    dragTarget.addEventListener('extension-drag-started', () => {
       this.hidden = false;
-    }.bind(this));
-    dragTarget.addEventListener('extension-drag-ended', function() {
+    });
+    dragTarget.addEventListener('extension-drag-ended', () => {
       this.hidden = true;
-    }.bind(this));
+    });
     this.dragWrapper_ =
         new cr.ui.DragWrapper(dragTarget, this.dragWrapperHandler_);
   },

chrome/browser/resources/md_extensions/error_page.js

@@ -138,9 +138,9 @@ cr.define('extensions', function() {
               0;
           break;
       }
-      this.delegate.requestFileSource(args).then(function(code) {
+      this.delegate.requestFileSource(args).then(code => {
         this.$['code-section'].code = code;
-      }.bind(this));
+      });
     },
 
     /**

chrome/browser/resources/md_extensions/manager.js

@@ -129,11 +129,10 @@ cr.define('extensions', function() {
       this.sidebar.setListDelegate(this.listHelper_);
       this.readyPromiseResolver.resolve();
       this.currentPage_ = {page: Page.LIST};
-      this.navigationHelper_ =
-          new extensions.NavigationHelper(function(newPage) {
-            this.changePage(newPage, true);
-          }.bind(this));
-      this.optionsDialog.addEventListener('close', function() {
+      this.navigationHelper_ = new extensions.NavigationHelper(newPage => {
+        this.changePage(newPage, true);
+      });
+      this.optionsDialog.addEventListener('close', () => {
         // We update the page when the options dialog closes, but only if we're
         // still on the details page. We could be on a different page if the
         // user hit back while the options dialog was visible; in that case, the
@@ -145,7 +144,7 @@ cr.define('extensions', function() {
           this.changePage(
               {page: Page.DETAILS, extensionId: this.currentPage_.extensionId});
         }
-      }.bind(this));
+      });
     },
 
     get keyboardShortcuts() {

chrome/browser/resources/md_extensions/options_dialog.js

@@ -37,7 +37,7 @@ cr.define('extensions', function() {
         return Math.min(Math.max(min, val), max);
       };
 
-      var onSizeChanged = function(e) {
+      var onSizeChanged = e => {
         var minHeaderWidth = this.$$('#icon-and-name-wrapper img').offsetWidth +
             this.$$('#icon-and-name-wrapper span').offsetWidth +
             HEADER_EXTRA_SPACING;
@@ -48,7 +48,7 @@ cr.define('extensions', function() {
             bounded(minWidth, MAX_WIDTH, e.width) + 'px';
         this.$.dialog.style.width =
             (bounded(minWidth, MAX_WIDTH, e.width) + DIALOG_PADDING) + 'px';
-      }.bind(this);
+      };
 
       this.extensionOptions_.onpreferredsizechanged = onSizeChanged;
       this.$.body.appendChild(this.extensionOptions_);

chrome/browser/resources/md_extensions/pack_dialog.js

@@ -54,18 +54,18 @@ cr.define('extensions', function() {
 
     /** @private */
     onRootBrowse_: function() {
-      this.delegate.choosePackRootDirectory().then(function(path) {
+      this.delegate.choosePackRootDirectory().then(path => {
         if (path)
           this.set('packDirectory_', path);
-      }.bind(this));
+      });
     },
 
     /** @private */
     onKeyBrowse_: function() {
-      this.delegate.choosePrivateKeyPath().then(function(path) {
+      this.delegate.choosePrivateKeyPath().then(path => {
         if (path)
           this.set('keyFile_', path);
-      }.bind(this));
+      });
     },
 
     /** @private */

chrome/browser/resources/md_extensions/service.js

@@ -43,14 +43,13 @@ cr.define('extensions', function() {
       chrome.developerPrivate.onItemStateChanged.addListener(
           this.onItemStateChanged_.bind(this));
       chrome.developerPrivate.getExtensionsInfo(
-          {includeDisabled: true, includeTerminated: true},
-          function(extensions) {
+          {includeDisabled: true, includeTerminated: true}, extensions => {
             this.extensions_ = extensions;
             for (let extension of extensions)
               this.manager_.addItem(extension);
 
             this.manager_.initPage();
-          }.bind(this));
+          });
       chrome.developerPrivate.getProfileConfiguration(
           this.onProfileStateChanged_.bind(this));
     }
@@ -181,13 +180,13 @@ cr.define('extensions', function() {
       if (this.isDeleting_)
         return;
       this.isDeleting_ = true;
-      chrome.management.uninstall(id, {showConfirmDialog: true}, function() {
+      chrome.management.uninstall(id, {showConfirmDialog: true}, () => {
         // The "last error" was almost certainly the user canceling the dialog.
         // Do nothing. We only check it so we don't get noisy logs.
         /** @suppress {suspiciousCode} */
         chrome.runtime.lastError;
         this.isDeleting_ = false;
-      }.bind(this));
+      });
     }
 
     /** @override */