Reduce boilerplate when creating simple mojom::URLLoaders.

content/network/cache_url_loader.cc

Index: content/network/cache_url_loader.cc
diff --git a/content/network/cache_url_loader.cc b/content/network/cache_url_loader.cc
index dc8cc19225edaa8d150e6af0d1981d3f9b3d4bf2..67e0ab7588f99d8ea446cddd18916d052872de37 100644
--- a/content/network/cache_url_loader.cc
+++ b/content/network/cache_url_loader.cc
@@ -52,28 +52,13 @@ class CacheURLLoader {
  private:
   void DataAvailable(int result) {
     DCHECK_EQ(net::OK, result);
-    MojoCreateDataPipeOptions options;
-    options.struct_size = sizeof(MojoCreateDataPipeOptions);
-    options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
-    options.element_num_bytes = 1;
-    options.capacity_num_bytes = data_.size();
-    mojo::DataPipe data_pipe(options);
-
-    DCHECK(data_pipe.producer_handle.is_valid());
-    DCHECK(data_pipe.consumer_handle.is_valid());
+    mojo::DataPipe data_pipe(data_.size());
 
     CHECK(
         mojo::common::BlockingCopyFromString(data_, data_pipe.producer_handle));
 
     client_->OnStartLoadingResponseBody(std::move(data_pipe.consumer_handle));
-
-    ResourceRequestCompletionStatus request_complete_data;
-    request_complete_data.error_code = net::OK;
-    request_complete_data.exists_in_cache = false;
-    request_complete_data.completion_time = base::TimeTicks::Now();
-    request_complete_data.encoded_data_length = data_.size();
-    request_complete_data.encoded_body_length = data_.size();
-    client_->OnComplete(request_complete_data);
+    client_->OnComplete(ResourceRequestCompletionStatus(data_.size()));
 
     // So we don't delete |this| in the constructor.
     base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);