Revert of Various changes required to support ChromeVox Next to read Views and Windows.

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

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
index 55267e68967b519680d92ef3cfbde67d85e73f0a..27b173d0fe216eaed357c6d1c6b25a307dd96f7f 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
@@ -86,13 +86,10 @@
   this.listeners_ = {
     alert: this.onEventDefault,
     focus: this.onEventDefault,
-    hover: this.onEventDefault,
     menuStart: this.onEventDefault,
     menuEnd: this.onEventDefault,
     loadComplete: this.onLoadComplete,
-    textChanged: this.onTextOrTextSelectionChanged,
-    textSelectionChanged: this.onTextOrTextSelectionChanged,
-    valueChanged: this.onEventDefault
+    textSelectionChanged: this.onTextSelectionChanged
   };
 
   // Register listeners for ...
@@ -101,6 +98,9 @@
 
   // Tabs.
   chrome.tabs.onUpdated.addListener(this.onTabUpdated);
+
+  // Commands.
+  chrome.commands.onCommand.addListener(this.onGotCommand);
 };
 
 Background.prototype = {
@@ -117,11 +117,6 @@
         return;
 
       var next = this.isWhitelisted_(tab.url);
-
-      // Only care about Next for now.
-      if (!next)
-        return;
-
       this.toggleChromeVoxVersion({next: next, classic: !next});
     }.bind(this));
   },
@@ -244,17 +239,11 @@
    */
   onEventDefault: function(evt) {
     var node = evt.target;
-
     if (!node)
       return;
 
     var prevRange = this.currentRange_;
     this.currentRange_ = cursors.Range.fromNode(node);
-
-    // Don't process nodes inside of web content if ChromeVox Next is inactive.
-    if (node.root.role != chrome.automation.RoleType.desktop && !this.active_)
-      return;
-
     new Output(this.currentRange_, prevRange, evt.type);
   },
 
@@ -277,14 +266,9 @@
    * Provides all feedback once a text selection change event fires.
    * @param {Object} evt
    */
-  onTextOrTextSelectionChanged: function(evt) {
-    if (!this.currentRange_) {
-      if (!evt.target.state.focused)
-        return;
-
-      this.onEventDefault(evt);
+  onTextSelectionChanged: function(evt) {
+    if (!this.currentRange_)
       this.currentRange_ = cursors.Range.fromNode(evt.target);
-    }
 
     var textChangeEvent = new cvox.TextChangeEvent(
         evt.target.attributes.value,
@@ -303,7 +287,6 @@
     }
 
     this.editableTextHandler.changed(textChangeEvent);
-    new Output(this.currentRange_, null, evt.type, {braille: true});
   },
 
   /**
@@ -340,16 +323,9 @@
     }
 
     if (opt_options.next) {
-      if (!chrome.commands.onCommand.hasListener(this.onGotCommand))
-        chrome.commands.onCommand.addListener(this.onGotCommand);
-
-      if (!this.active_)
-        chrome.automation.getTree(this.onGotTree);
+      chrome.automation.getTree(this.onGotTree);
       this.active_ = true;
     } else {
-      if (chrome.commands.onCommand.hasListener(this.onGotCommand))
-        chrome.commands.onCommand.removeListener(this.onGotCommand);
-
       if (this.active_) {
         for (var eventType in this.listeners_) {
           this.currentRange_.getStart().getNode().root.removeEventListener(