Bug 1629113 - Move caret browsing handler to tabbrowser.js. r=NeilDeakin

We don't use it on GeckoView.

Differential Revision: https://phabricator.services.mozilla.com/D72724

toolkit/content/widgets/browser-custom-element.js

@@ -111,80 +111,6 @@
         return new LazyModules.PopupBlocker(this);
       });
 
-      this.addEventListener(
-        "keypress",
-        event => {
-          if (event.keyCode != KeyEvent.DOM_VK_F7) {
-            return;
-          }
-
-          // shift + F7 is the default DevTools shortcut for the Style Editor.
-          if (event.shiftKey) {
-            return;
-          }
-
-          if (event.defaultPrevented || !event.isTrusted) {
-            return;
-          }
-
-          const kPrefShortcutEnabled =
-            "accessibility.browsewithcaret_shortcut.enabled";
-          const kPrefWarnOnEnable = "accessibility.warn_on_browsewithcaret";
-          const kPrefCaretBrowsingOn = "accessibility.browsewithcaret";
-
-          var isEnabled = this.mPrefs.getBoolPref(kPrefShortcutEnabled);
-          if (!isEnabled) {
-            return;
-          }
-
-          // Toggle browse with caret mode
-          var browseWithCaretOn = this.mPrefs.getBoolPref(
-            kPrefCaretBrowsingOn,
-            false
-          );
-          var warn = this.mPrefs.getBoolPref(kPrefWarnOnEnable, true);
-          if (warn && !browseWithCaretOn) {
-            var checkValue = { value: false };
-            var promptService = Services.prompt;
-
-            var buttonPressed = promptService.confirmEx(
-              window,
-              this.mStrBundle.GetStringFromName(
-                "browsewithcaret.checkWindowTitle"
-              ),
-              this.mStrBundle.GetStringFromName("browsewithcaret.checkLabel"),
-              // Make "No" the default:
-              promptService.STD_YES_NO_BUTTONS |
-                promptService.BUTTON_POS_1_DEFAULT,
-              null,
-              null,
-              null,
-              this.mStrBundle.GetStringFromName("browsewithcaret.checkMsg"),
-              checkValue
-            );
-            if (buttonPressed != 0) {
-              if (checkValue.value) {
-                try {
-                  this.mPrefs.setBoolPref(kPrefShortcutEnabled, false);
-                } catch (ex) {}
-              }
-              return;
-            }
-            if (checkValue.value) {
-              try {
-                this.mPrefs.setBoolPref(kPrefWarnOnEnable, false);
-              } catch (ex) {}
-            }
-          }
-
-          // Toggle the pref
-          try {
-            this.mPrefs.setBoolPref(kPrefCaretBrowsingOn, !browseWithCaretOn);
-          } catch (ex) {}
-        },
-        { mozSystemGroup: true }
-      );
-
       this.addEventListener(
         "dragover",
         event => {