Rename the 'or' function in the chromevox next output language to 'if'.

The semantic of this function matches the usual semantic of if better
than or, since or usually returns the first of its arguments that is
true, while if evaluates a condition and returns a second or third
argument depending of the truth value of its first ditto.

R=dtseng@chromium.org
BUG=

Review URL: https://codereview.chromium.org/939153002

Cr-Commit-Position: refs/heads/master@{#317059}

chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js

@@ -94,9 +94,9 @@ Output.RULES = {
       speak: '$name $earcon(BUTTON, @tag_button)'
     },
     checkBox: {
-      speak: '$or($checked, @describe_checkbox_checked($name), ' +
+      speak: '$if($checked, @describe_checkbox_checked($name), ' +
           '@describe_checkbox_unchecked($name)) ' +
-          '$or($checked, ' +
+          '$if($checked, ' +
               '$earcon(CHECK_ON, @input_type_checkbox), ' +
               '$earcon(CHECK_OFF, @input_type_checkbox))'
     },
@@ -122,7 +122,7 @@ Output.RULES = {
       enter: '$role'
     },
     menuItem: {
-      speak: '$or($haspopup, @describe_menu_item_with_submenu($name), ' +
+      speak: '$if($haspopup, @describe_menu_item_with_submenu($name), ' +
           '@describe_menu_item($name)) ' +
           '@describe_index($indexInParent, $parentChildCount)'
     },
@@ -135,12 +135,12 @@ Output.RULES = {
     },
     popUpButton: {
       speak: '$value $name @tag_button @aria_has_popup $earcon(LISTBOX) ' +
-          '$or($collapsed, @aria_expanded_false, @aria_expanded_true)'
+          '$if($collapsed, @aria_expanded_false, @aria_expanded_true)'
     },
     radioButton: {
-      speak: '$or($checked, @describe_radio_selected($name), ' +
+      speak: '$if($checked, @describe_radio_selected($name), ' +
           '@describe_radio_unselected($name)) ' +
-          '$or($checked, ' +
+          '$if($checked, ' +
               '$earcon(CHECK_ON, @input_type_radio), ' +
               '$earcon(CHECK_OFF, @input_type_radio))'
     },
@@ -509,7 +509,7 @@ Output.prototype = {
           this.addToSpannable_(buff, token, options);
         } else if (tree.firstChild) {
           // Custom functions.
-          if (token == 'or') {
+          if (token == 'if') {
             var cond = tree.firstChild;
             var attrib = cond.value.slice(1);
             if (node.attributes[attrib] || node.state[attrib])