Add support for reading blobs when using the network service.

storage/browser/blob/blob_url_request_job.cc

Index: storage/browser/blob/blob_url_request_job.cc
diff --git a/storage/browser/blob/blob_url_request_job.cc b/storage/browser/blob/blob_url_request_job.cc
index 8d7aaea7c2dae0f35deb53893f90d7013bda499b..d257dc620bcfd76592da7b2fc99959a5c8ce8c83 100644
--- a/storage/browser/blob/blob_url_request_job.cc
+++ b/storage/browser/blob/blob_url_request_job.cc
@@ -143,6 +143,54 @@ void BlobURLRequestJob::SetExtraRequestHeaders(
   }
 }
 
+scoped_refptr<net::HttpResponseHeaders> BlobURLRequestJob::GenerateHeaders(
+    net::HttpStatusCode status_code,
+    BlobDataHandle* blob_handle,
+    BlobReader* blob_reader,
+    net::HttpByteRange* byte_range,
+    int64_t* content_size) {
+  std::string status("HTTP/1.1 ");
+  status.append(base::IntToString(status_code));
+  status.append(" ");
+  status.append(net::GetHttpReasonPhrase(status_code));
+  status.append("\0\0", 2);
+  scoped_refptr<net::HttpResponseHeaders> headers =
+      new net::HttpResponseHeaders(status);
+
+  if (status_code == net::HTTP_OK || status_code == net::HTTP_PARTIAL_CONTENT) {
+    *content_size = blob_reader->remaining_bytes();
+    std::string content_length_header(net::HttpRequestHeaders::kContentLength);
+    content_length_header.append(": ");
+    content_length_header.append(base::Int64ToString(*content_size));
+    headers->AddHeader(content_length_header);
+    if (status_code == net::HTTP_PARTIAL_CONTENT) {
+      DCHECK(byte_range->IsValid());
+      std::string content_range_header(net::HttpResponseHeaders::kContentRange);
+      content_range_header.append(": bytes ");
+      content_range_header.append(base::StringPrintf(
+          "%" PRId64 "-%" PRId64, byte_range->first_byte_position(),
+          byte_range->last_byte_position()));
+      content_range_header.append("/");
+      content_range_header.append(
+          base::StringPrintf("%" PRId64, blob_reader->total_size()));
+      headers->AddHeader(content_range_header);
+    }
+    if (!blob_handle->content_type().empty()) {
+      std::string content_type_header(net::HttpRequestHeaders::kContentType);
+      content_type_header.append(": ");
+      content_type_header.append(blob_handle->content_type());
+      headers->AddHeader(content_type_header);
+    }
+    if (!blob_handle->content_disposition().empty()) {
+      std::string content_disposition_header("Content-Disposition: ");
+      content_disposition_header.append(blob_handle->content_disposition());
+      headers->AddHeader(content_disposition_header);
+    }
+  }
+
+  return headers;
+}
+
 BlobURLRequestJob::~BlobURLRequestJob() {
   TRACE_EVENT_ASYNC_END1("Blob", "BlobRequest", this, "uuid",
                          blob_handle_ ? blob_handle_->uuid() : "NotFound");
@@ -274,50 +322,12 @@ void BlobURLRequestJob::NotifyFailure(int error_code) {
 }
 
 void BlobURLRequestJob::HeadersCompleted(net::HttpStatusCode status_code) {
-  std::string status("HTTP/1.1 ");
-  status.append(base::IntToString(status_code));
-  status.append(" ");
-  status.append(net::GetHttpReasonPhrase(status_code));
-  status.append("\0\0", 2);
-  net::HttpResponseHeaders* headers = new net::HttpResponseHeaders(status);
-
-  set_expected_content_size(0);
-
-  if (status_code == net::HTTP_OK || status_code == net::HTTP_PARTIAL_CONTENT) {
-    set_expected_content_size(blob_reader_->remaining_bytes());
-    std::string content_length_header(net::HttpRequestHeaders::kContentLength);
-    content_length_header.append(": ");
-    content_length_header.append(
-        base::Int64ToString(blob_reader_->remaining_bytes()));
-    headers->AddHeader(content_length_header);
-    if (status_code == net::HTTP_PARTIAL_CONTENT) {
-      DCHECK(byte_range_set_);
-      DCHECK(byte_range_.IsValid());
-      std::string content_range_header(net::HttpResponseHeaders::kContentRange);
-      content_range_header.append(": bytes ");
-      content_range_header.append(base::StringPrintf(
-          "%" PRId64 "-%" PRId64, byte_range_.first_byte_position(),
-          byte_range_.last_byte_position()));
-      content_range_header.append("/");
-      content_range_header.append(
-          base::StringPrintf("%" PRId64, blob_reader_->total_size()));
-      headers->AddHeader(content_range_header);
-    }
-    if (!blob_handle_->content_type().empty()) {
-      std::string content_type_header(net::HttpRequestHeaders::kContentType);
-      content_type_header.append(": ");
-      content_type_header.append(blob_handle_->content_type());
-      headers->AddHeader(content_type_header);
-    }
-    if (!blob_handle_->content_disposition().empty()) {
-      std::string content_disposition_header("Content-Disposition: ");
-      content_disposition_header.append(blob_handle_->content_disposition());
-      headers->AddHeader(content_disposition_header);
-    }
-  }
-
+  int64_t content_size = 0;
   response_info_.reset(new net::HttpResponseInfo());
-  response_info_->headers = headers;
+  response_info_->headers =
+      GenerateHeaders(status_code, blob_handle_.get(), blob_reader_.get(),
+                      &byte_range_, &content_size);
+  set_expected_content_size(content_size);
   if (blob_reader_)
     response_info_->metadata = blob_reader_->side_data();