Enhance and refactor ChromeDriver's capability handling. Log warning for

chrome/test/webdriver/webdriver_util.cc

Index: chrome/test/webdriver/webdriver_util.cc
diff --git a/chrome/test/webdriver/webdriver_util.cc b/chrome/test/webdriver/webdriver_util.cc
index 45e080f378877a307f30559fc5ff90e609ecd48e..b1789dac3f22f7e8cb66b382543377bf8215859c 100644
--- a/chrome/test/webdriver/webdriver_util.cc
+++ b/chrome/test/webdriver/webdriver_util.cc
@@ -9,7 +9,8 @@
 #include "base/json/json_writer.h"
 #include "base/rand_util.h"
 #include "base/stringprintf.h"
-#include "base/values.h"
+
+using base::Value;
 
 namespace webdriver {
 
@@ -27,6 +28,28 @@ std::string JsonStringify(const Value* value) {
   return json;
 }
 
+const char* GetJsonTypeName(Value::Type type) {
+  switch (type) {
+    case Value::TYPE_NULL:
+      return "null";
+    case Value::TYPE_BOOLEAN:
+      return "boolean";
+    case Value::TYPE_INTEGER:
+      return "integer";
+    case Value::TYPE_DOUBLE:
+      return "double";
+    case Value::TYPE_STRING:
+      return "string";
+    case Value::TYPE_BINARY:
+      return "binary";
+    case Value::TYPE_DICTIONARY:
+      return "dictionary";
+    case Value::TYPE_LIST:
+      return "list";
+  }
+  return "unknown";
+}
+
 ValueParser::ValueParser() { }
 
 ValueParser::~ValueParser() { }