Re-tune pitch in ChromeVox

- capital personality was tuned for Google tts some years ago. It is too high for the current engine
- re-do precedence logic. Do not set speech props if they were supplied by callers.

Bug: 855257
Change-Id: I541021fa456c5283e943ecb71183e99c547a4f8a
Reviewed-on: https://chromium-review.googlesource.com/1115517Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570546}

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

@@ -12,6 +12,7 @@ goog.provide('cvox.KbExplorer');
 goog.require('BrailleCommandData');
 goog.require('GestureCommandData');
 goog.require('Spannable');
+goog.require('cvox.AbstractTts');
 goog.require('cvox.BrailleKeyCommand');
 goog.require('cvox.ChromeVoxKbHandler');
 goog.require('cvox.CommandStore');
@@ -83,7 +84,8 @@ cvox.KbExplorer.init = function() {
  */
 cvox.KbExplorer.onKeyDown = function(evt) {
   chrome.extension.getBackgroundPage()['speak'](
-      cvox.KeyUtil.getReadableNameForKeyCode(evt.keyCode), false, {pitch: 0});
+      cvox.KeyUtil.getReadableNameForKeyCode(evt.keyCode), false,
+      cvox.AbstractTts.PERSONALITY_ANNOTATION);
 
   // Allow Ctrl+W to be handled.
   if (evt.keyCode == 87 && evt.ctrlKey) {

chrome/browser/resources/chromeos/chromevox/host/interface/abstract_tts.js

@@ -215,9 +215,12 @@ cvox.AbstractTts.prototype.mergeProperties = function(properties) {
  */
 cvox.AbstractTts.prototype.preprocess = function(text, properties) {
   if (text.length == 1 && text >= 'A' && text <= 'Z') {
-    for (var prop in cvox.AbstractTts.PERSONALITY_CAPITAL)
+    for (var prop in cvox.AbstractTts.PERSONALITY_CAPITAL) {
+      if (properties[prop] === undefined) {
         properties[prop] = cvox.AbstractTts.PERSONALITY_CAPITAL[prop];
       }
+    }
+  }
 
   // Substitute all symbols in the substitution dictionary. This is pretty
   // efficient because we use a single regexp that matches all symbols
@@ -327,7 +330,7 @@ cvox.AbstractTts.PERSONALITY_ASIDE = {
  * @type {Object}
  */
 cvox.AbstractTts.PERSONALITY_CAPITAL = {
-  'relativePitch': 0.6
+  'relativePitch': 0.2
 };