Reduce boilerplate when creating simple mojom::URLLoaders.

content/common/resource_request_completion_status.cc

Index: content/common/resource_request_completion_status.cc
diff --git a/content/common/resource_request_completion_status.cc b/content/common/resource_request_completion_status.cc
index 4f2c850a08935dcd5d8104ae9b4fbe058f907bfd..3720d24fdbae3deae7f3d6c0f56e4b042809dc35 100644
--- a/content/common/resource_request_completion_status.cc
+++ b/content/common/resource_request_completion_status.cc
@@ -4,11 +4,20 @@
 
 #include "content/common/resource_request_completion_status.h"
 
+#include "net/base/net_errors.h"
+
 namespace content {
 
 ResourceRequestCompletionStatus::ResourceRequestCompletionStatus() {}
 ResourceRequestCompletionStatus::ResourceRequestCompletionStatus(
     const ResourceRequestCompletionStatus& status) = default;
+
+ResourceRequestCompletionStatus::ResourceRequestCompletionStatus(int64_t length)
+    : error_code(net::OK),
+      completion_time(base::TimeTicks::Now()),
+      encoded_data_length(length),
+      encoded_body_length(length) {}
+
 ResourceRequestCompletionStatus::~ResourceRequestCompletionStatus() {}
 
 }  // namespace content