json_schema_compiler: Use std::vector<char> for binary values.

extensions/browser/api/hid/hid_device_manager.cc

Index: extensions/browser/api/hid/hid_device_manager.cc
diff --git a/extensions/browser/api/hid/hid_device_manager.cc b/extensions/browser/api/hid/hid_device_manager.cc
index 28003be23624bf72bce8b5bc6abb3cec8e8fe49d..5a6403c87c95b01bc5fb318e76adb27b5c647ee1 100644
--- a/extensions/browser/api/hid/hid_device_manager.cc
+++ b/extensions/browser/api/hid/hid_device_manager.cc
@@ -52,9 +52,8 @@ void PopulateHidDeviceInfo(hid::HidDeviceInfo* output,
 
   const std::vector<uint8>& report_descriptor = input->report_descriptor();
   if (report_descriptor.size() > 0) {
-    output->report_descriptor =
-        std::string(reinterpret_cast<const char*>(&report_descriptor[0]),
-                    report_descriptor.size());
+    output->report_descriptor.assign(report_descriptor.begin(),
+                                     report_descriptor.end());
   }
 }