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

chrome/browser/chromeos/extensions/wallpaper_api.cc

Index: chrome/browser/chromeos/extensions/wallpaper_api.cc
diff --git a/chrome/browser/chromeos/extensions/wallpaper_api.cc b/chrome/browser/chromeos/extensions/wallpaper_api.cc
index 99c42ad63082b972345e66f070dc67e0a68ce90d..5eb9af3dcf20b53a175461c4b38e680228cbfa2e 100644
--- a/chrome/browser/chromeos/extensions/wallpaper_api.cc
+++ b/chrome/browser/chromeos/extensions/wallpaper_api.cc
@@ -4,6 +4,9 @@
 
 #include "chrome/browser/chromeos/extensions/wallpaper_api.h"
 
+#include <string>
+#include <vector>
+
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
@@ -205,7 +208,8 @@ void WallpaperSetWallpaperFunction::OnWallpaperFetched(
     bool success,
     const std::string& response) {
   if (success) {
-    params_->details.data.reset(new std::string(response));
+    params_->details.data.reset(
+        new std::vector<char>(response.begin(), response.end()));
     StartDecode(*params_->details.data);
   } else {
     SetError(response);