Use all of the arguments to build the console messages

src/inspector/v8-console-message.cc

Index: src/inspector/v8-console-message.cc
diff --git a/src/inspector/v8-console-message.cc b/src/inspector/v8-console-message.cc
index 22fe18137ede9a1cb1bda927634321fc7affd259..abbab1f6ce308525aace64bd73fc12a72b32acc4 100644
--- a/src/inspector/v8-console-message.cc
+++ b/src/inspector/v8-console-message.cc
@@ -65,10 +65,13 @@ const unsigned maxStackDepthLimit = 32;
 
 class V8ValueStringBuilder {
  public:
-  static String16 toString(v8::Local<v8::Value> value,
+  static String16 toString(const std::vector<v8::Local<v8::Value>>& arguments,
                            v8::Local<v8::Context> context) {
     V8ValueStringBuilder builder(context);
-    if (!builder.append(value)) return String16();
+    for (size_t i = 0; i < arguments.size(); ++i) {
+      if (i > 0) builder.append(" ");
+      if (!builder.append(arguments.at(i))) return String16();
+    }
     return builder.toString();
   }
 
@@ -161,6 +164,11 @@ class V8ValueStringBuilder {
     return true;
   }
 
+  bool append(const String16& string) {
+    m_builder.append(string);
+    return true;
+  }
+
   String16 toString() {
     if (m_tryCatch.HasCaught()) return String16();
     return m_builder.toString();
@@ -376,8 +384,7 @@ std::unique_ptr<V8ConsoleMessage> V8ConsoleMessage::createForConsoleAPI(
         v8::debug::EstimatedValueSize(isolate, arguments.at(i));
   }
   if (arguments.size())
-    message->m_message =
-        V8ValueStringBuilder::toString(arguments[0], v8Context);
+    message->m_message = V8ValueStringBuilder::toString(arguments, v8Context);
 
   v8::Isolate::MessageErrorLevel clientLevel = v8::Isolate::kMessageInfo;
   if (type == ConsoleAPIType::kDebug || type == ConsoleAPIType::kCount ||