diff --git a/cobalt/webdriver/BUILD.gn b/cobalt/webdriver/BUILD.gn
index 5cf3bfe2abff..a43cd40dfde1 100644
--- a/cobalt/webdriver/BUILD.gn
+++ b/cobalt/webdriver/BUILD.gn
@@ -134,6 +134,7 @@ target(gtest_target_type, "webdriver_test") {
   testonly = true
 
   sources = [
+    "dispatcher_test.cc",
     "execute_test.cc",
     "get_element_text_test.cc",
     "is_displayed_test.cc",
diff --git a/cobalt/webdriver/dispatcher_test.cc b/cobalt/webdriver/dispatcher_test.cc
new file mode 100644
index 000000000000..0e0b654ce840
--- /dev/null
+++ b/cobalt/webdriver/dispatcher_test.cc
@@ -0,0 +1,61 @@
+// Copyright 2024 The Cobalt Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "cobalt/webdriver/dispatcher.h"
+
+#include <utility>
+
+#include "base/optional.h"
+#include "base/values.h"
+#include "cobalt/webdriver/protocol/log_type.h"
+#include "cobalt/webdriver/protocol/window_id.h"
+#include "cobalt/webdriver/session_driver.h"
+#include "cobalt/webdriver/util/command_result.h"
+#include "cobalt/webdriver/util/dispatch_command_factory.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace cobalt {
+namespace webdriver {
+
+TEST(FromValueTest, WindowID) {
+  base::Value::Dict dict;
+  dict.Set("name", "foo");
+  base::Value value(std::move(dict));
+  auto result = util::internal::FromValue<protocol::WindowId>(&value);
+  EXPECT_EQ(result->id(), "foo");
+}
+
+TEST(FromValueTest, WindowID_Fail) {
+  base::Value empty;
+  auto result = util::internal::FromValue<protocol::WindowId>(&empty);
+  EXPECT_EQ(result, base::nullopt);
+}
+
+TEST(FromValueTest, LogType) {
+  base::Value::Dict dict;
+  dict.Set("type", "foo");
+  base::Value value(std::move(dict));
+  auto result = util::internal::FromValue<protocol::LogType>(&value);
+  EXPECT_EQ(result->type(), "foo");
+}
+
+TEST(FromValueTest, LogType_Fail) {
+  base::Value empty;
+  auto result = util::internal::FromValue<protocol::LogType>(&empty);
+  EXPECT_EQ(result, base::nullopt);
+}
+
+}  // namespace webdriver
+}  // namespace cobalt
diff --git a/cobalt/webdriver/protocol/log_type.cc b/cobalt/webdriver/protocol/log_type.cc
index 6bcc7d87a440..38fe6cbbead6 100644
--- a/cobalt/webdriver/protocol/log_type.cc
+++ b/cobalt/webdriver/protocol/log_type.cc
@@ -18,12 +18,21 @@ namespace cobalt {
 namespace webdriver {
 namespace protocol {
 
+namespace {
+const char kLogTypeKey[] = "type";
+}
+
+
 base::Optional<LogType> LogType::FromValue(const base::Value* value) {
   const base::Value::Dict* dictionary_value = value->GetIfDict();
   if (!dictionary_value) {
     return absl::nullopt;
   }
-  return base::nullopt;
+  auto type = dictionary_value->FindString(kLogTypeKey);
+  if (!type) {
+    return absl::nullopt;
+  }
+  return LogType(*type);
 }
 
 }  // namespace protocol
diff --git a/cobalt/webdriver/protocol/window_id.cc b/cobalt/webdriver/protocol/window_id.cc
index b63667956cbb..17bec6d4feb7 100644
--- a/cobalt/webdriver/protocol/window_id.cc
+++ b/cobalt/webdriver/protocol/window_id.cc
@@ -26,7 +26,11 @@ base::Optional<WindowId> WindowId::FromValue(const base::Value* value) {
   if (!dictionary_value) {
     return absl::nullopt;
   }
-  return base::nullopt;
+  auto window_id = dictionary_value->FindString(kWindowNameKey);
+  if (!window_id) {
+    return absl::nullopt;
+  }
+  return WindowId(*window_id);
 }
 
 }  // namespace protocol
diff --git a/cobalt/webdriver/util/dispatch_command_factory.h b/cobalt/webdriver/util/dispatch_command_factory.h
index 6cf6a7bf865d..e7e8b7c2ecd0 100644
--- a/cobalt/webdriver/util/dispatch_command_factory.h
+++ b/cobalt/webdriver/util/dispatch_command_factory.h
@@ -92,13 +92,13 @@ std::unique_ptr<base::Value> ToValue(const base::Optional<T>& value) {
 
 // Template specialization for std::string.
 template <>
-std::unique_ptr<base::Value> ToValue(const std::string& value) {
+inline std::unique_ptr<base::Value> ToValue(const std::string& value) {
   return std::unique_ptr<base::Value>(new base::Value(value));
 }
 
 // Template specialization for bool.
 template <>
-std::unique_ptr<base::Value> ToValue(const bool& value) {
+inline std::unique_ptr<base::Value> ToValue(const bool& value) {
   return std::unique_ptr<base::Value>(new base::Value(value));
 }
 
@@ -108,7 +108,7 @@ std::unique_ptr<base::Value> ToValue(const CommandResult<R>& command_result) {
 }
 
 template <>
-std::unique_ptr<base::Value> ToValue(
+inline std::unique_ptr<base::Value> ToValue(
     const CommandResult<void>& command_result) {
   return std::make_unique<base::Value>();
 }
@@ -121,7 +121,7 @@ base::Optional<T> FromValue(const base::Value* value) {
 }
 
 template <>
-base::Optional<GURL> FromValue(const base::Value* value) {
+inline base::Optional<GURL> FromValue(const base::Value* value) {
   const char kUrlKey[] = "url";
 
   const base::Value::Dict* dictionary_value = value->GetIfDict();