Media Galleries API Metadata: Make BlobReader accessible to other extensions.

BUG=318450

Review URL: https://codereview.chromium.org/79933004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237134 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 23 insertions, 5 deletions

diff --git a/chrome/browser/extensions/api/feedback_private/feedback_service.h b/chrome/browser/extensions/api/feedback_private/feedback_service.h
index 49ff614..04acac4 100644
--- a/chrome/browser/extensions/api/feedback_private/feedback_service.h
+++ b/chrome/browser/extensions/api/feedback_private/feedback_service.h
@@ -10,7 +10,7 @@
 #include "base/callback.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "chrome/browser/extensions/api/feedback_private/blob_reader.h"
+#include "chrome/browser/extensions/blob_reader.h"
 #include "chrome/browser/feedback/feedback_data.h"
 #include "chrome/common/extensions/api/feedback_private.h"
 
diff --git a/chrome/browser/extensions/api/feedback_private/blob_reader.cc b/chrome/browser/extensions/blob_reader.cc
index 4ee07c9..0cfe187 100644
--- a/chrome/browser/extensions/api/feedback_private/blob_reader.cc
+++ b/chrome/browser/extensions/blob_reader.cc
@@ -2,11 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/extensions/api/feedback_private/blob_reader.h"
+#include "chrome/browser/extensions/blob_reader.h"
 
+#include "base/format_macros.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/browser_thread.h"
+#include "net/http/http_request_headers.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
@@ -32,6 +35,19 @@ BlobReader::BlobReader(Profile* profile,
 BlobReader::~BlobReader() {
 }
 
+void BlobReader::SetByteRange(int64 offset, int64 length) {
+  CHECK_GE(offset, 0);
+  CHECK_GT(length, 0);
+  CHECK_LE(offset, kint64max - length);
+
+  net::HttpRequestHeaders headers;
+  headers.SetHeader(
+      net::HttpRequestHeaders::kRange,
+      base::StringPrintf("bytes=%" PRId64 "-%" PRId64, offset,
+                         offset + length - 1));
+  fetcher_->SetExtraRequestHeaders(headers.ToString());
+}
+
 void BlobReader::Start() {
   fetcher_->Start();
 }
diff --git a/chrome/browser/extensions/api/feedback_private/blob_reader.h b/chrome/browser/extensions/blob_reader.h
index 455d2c0..45d011d 100644
--- a/chrome/browser/extensions/api/feedback_private/blob_reader.h
+++ b/chrome/browser/extensions/blob_reader.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_BLOB_READER_H_
-#define CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_BLOB_READER_H_
+#ifndef CHROME_BROWSER_EXTENSIONS_BLOB_READER_H_
+#define CHROME_BROWSER_EXTENSIONS_BLOB_READER_H_
 
 #include <string>
 
@@ -29,6 +29,8 @@ class BlobReader : public net::URLFetcherDelegate {
              BlobReadCallback callback);
   virtual ~BlobReader();
 
+  void SetByteRange(int64 offset, int64 length);
+
   void Start();
 
  private:
@@ -41,4 +43,4 @@ class BlobReader : public net::URLFetcherDelegate {
   DISALLOW_COPY_AND_ASSIGN(BlobReader);
 };
 
-#endif  // CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_BLOB_READER_H_
+#endif  // CHROME_BROWSER_EXTENSIONS_BLOB_READER_H_