JSONWriter cleanup: integrate pretty print into write options.

content/browser/debugger/devtools_http_handler_impl.cc

Index: content/browser/debugger/devtools_http_handler_impl.cc
diff --git a/content/browser/debugger/devtools_http_handler_impl.cc b/content/browser/debugger/devtools_http_handler_impl.cc
index 3016b87c36d0c018b0bdf5f12b30cbc5e45c5161..4cdb6b0b1f65c6836ab6eb368cb1f0c045bf99c3 100644
--- a/content/browser/debugger/devtools_http_handler_impl.cc
+++ b/content/browser/debugger/devtools_http_handler_impl.cc
@@ -387,7 +387,9 @@ void DevToolsHttpHandlerImpl::OnJsonRequestUI(
   }
 
   std::string response;
-  base::JSONWriter::Write(&json_pages_list, true, &response);
+  base::JSONWriter::WriteWithOptions(&json_pages_list,
+                                     base::JSONWriter::OPTIONS_PRETTY_PRINT,
+                                     &response);
   Send200(connection_id, response, "application/json; charset=UTF-8");
 }