Upgrade ui/accessibility from deprecated Value-conversion API

Bug: 1086733
Change-Id: If2f08ecb345051677ec5dc249fa5e5922229e633
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2235253
Commit-Queue: Nektarios Paisios <nektar@chromium.org>
Reviewed-by: Nektarios Paisios <nektar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776899}

ui/accessibility/BUILD.gn

@@ -175,7 +175,10 @@ jumbo_component("accessibility") {
     "platform/compute_attributes.h",
   ]
 
-  deps = [ "//third_party/cld_3/src/src:cld_3" ]
+  deps = [
+    "//base/util/values:values_util",
+    "//third_party/cld_3/src/src:cld_3",
+  ]
 
   public_deps = [
     ":ax_base",

ui/accessibility/ax_tree_id.cc

@@ -10,7 +10,7 @@
 #include "base/check.h"
 #include "base/no_destructor.h"
 #include "base/notreached.h"
-#include "base/value_conversions.h"
+#include "base/util/values/values_util.h"
 #include "base/values.h"
 #include "ui/accessibility/ax_enums.mojom.h"
 
@@ -30,10 +30,10 @@ AXTreeID::AXTreeID(const std::string& string) {
     type_ = ax::mojom::AXTreeIDType::kUnknown;
   } else {
     type_ = ax::mojom::AXTreeIDType::kToken;
-    base::Value string_value(string);
-    base::UnguessableToken token;
-    CHECK(base::GetValueAsUnguessableToken(string_value, &token));
-    token_ = token;
+    base::Optional<base::UnguessableToken> token =
+        util::ValueToUnguessableToken(base::Value(string));
+    CHECK(token);
+    token_ = *token;
   }
 }
 
@@ -54,7 +54,7 @@ std::string AXTreeID::ToString() const {
     case ax::mojom::AXTreeIDType::kUnknown:
       return "";
     case ax::mojom::AXTreeIDType::kToken:
-      return base::CreateUnguessableTokenValue(*token_).GetString();
+      return util::UnguessableTokenToValue(*token_).GetString();
   }
 
   NOTREACHED();