[ios] Adds support for parsing Text-to-Speech search results.

ios/chrome/BUILD.gn

Index: ios/chrome/BUILD.gn
diff --git a/ios/chrome/BUILD.gn b/ios/chrome/BUILD.gn
index 236f79d9865b0194176b6768d350ea69fc1ecbc4..f887a0ea3dfb2c8a9495d0b433ea6929dbd30806 100644
--- a/ios/chrome/BUILD.gn
+++ b/ios/chrome/BUILD.gn
@@ -9,6 +9,7 @@ import("//testing/test.gni")
 bundle_data("ios_chrome_unittests_bundle_data") {
   testonly = true
   sources = [
+    "test/data/voice/test_sound.m4a",
     "test/data/webdata/bookmarkimages/image.jpg",
     "test/data/webdata/bookmarkimages/index.html",
     "test/data/webp_transcode/test.jpg",
@@ -119,6 +120,8 @@ test("ios_chrome_unittests") {
     "//ios/chrome/browser",
     "//ios/chrome/browser:test_support",
     "//ios/chrome/browser/signin:unit_tests",
+    "//ios/chrome/browser/ui/voice:tts_unit_tests",
+    "//ios/chrome/browser/voice:tts_unit_tests",
     "//ios/chrome/common",
     "//ios/chrome/test",
     "//ios/chrome/test:run_all_unittests",