Make character text changes work in Docs

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

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/editing.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/editing.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/editing.js
index 1b5ee25d9906ed8f6d957da4b36c8d9fb9b6af26..a1b0f52361e4c612c42e349968f8654d2ae93fe3 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/editing.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/editing.js
@@ -13,6 +13,7 @@ goog.require('AutomationTreeWalker');
 goog.require('AutomationUtil');
 goog.require('Output');
 goog.require('Output.EventType');
+goog.require('TreePathRecoveryStrategy');
 goog.require('cursors.Cursor');
 goog.require('cursors.Range');
 goog.require('cvox.BrailleBackground');
@@ -661,6 +662,8 @@ editing.EditableLine = function(
   this.lineEndContainer_;
   /** @private {number} */
   this.localLineEndContainerOffset_ = 0;
+  /** @type {RecoveryStrategy} */
+  this.lineStartContainerRecovery_;
 
   this.computeLineData_(opt_baseLineOnStart);
 };
@@ -766,6 +769,11 @@ editing.EditableLine.prototype = {
     }
     this.localLineStartContainerOffset_ = textCountBeforeLineStart;
 
+    if (this.lineStartContainer_) {
+      this.lineStartContainerRecovery_ =
+          new TreePathRecoveryStrategy(this.lineStartContainer_);
+    }
+
     finder = this.lineEnd_;
     while (finder.nextSibling) {
       finder = finder.nextSibling;
@@ -908,7 +916,11 @@ editing.EditableLine.prototype = {
                 this.localLineStartContainerOffset_) ||
         (otherLine.lineEndContainer_ == this.lineEndContainer_ &&
          otherLine.localLineEndContainerOffset_ ==
-             this.localLineEndContainerOffset_);
+             this.localLineEndContainerOffset_) ||
+        (otherLine.lineStartContainerRecovery_.node ==
+             this.lineStartContainerRecovery_.node &&
+         otherLine.localLineStartContainerOffset_ ==
+             this.localLineStartContainerOffset_);
   },
 
   /**