Add mime type information to the download database

content/browser/download/download_manager_impl.cc

Index: content/browser/download/download_manager_impl.cc
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index f796f2ff6821a9e0c84804b696f6cb87e59ea874..0abe0699abdcc3ca8d0f9ab747c47ad3e700adf0 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -169,6 +169,8 @@ class DownloadItemFactoryImpl : public DownloadItemFactory {
       const base::FilePath& target_path,
       const std::vector<GURL>& url_chain,
       const GURL& referrer_url,
+      const std::string& mime_type,
+      const std::string& original_mime_type,
       const base::Time& start_time,
       const base::Time& end_time,
       const std::string& etag,
@@ -187,6 +189,8 @@ class DownloadItemFactoryImpl : public DownloadItemFactory {
         target_path,
         url_chain,
         referrer_url,
+        mime_type,
+        original_mime_type,
         start_time,
         end_time,
         etag,
@@ -619,6 +623,8 @@ DownloadItem* DownloadManagerImpl::CreateDownloadItem(
     const base::FilePath& target_path,
     const std::vector<GURL>& url_chain,
     const GURL& referrer_url,
+    const std::string& mime_type,
+    const std::string& original_mime_type,
     const base::Time& start_time,
     const base::Time& end_time,
     const std::string& etag,
@@ -640,6 +646,8 @@ DownloadItem* DownloadManagerImpl::CreateDownloadItem(
       target_path,
       url_chain,
       referrer_url,
+      mime_type,
+      original_mime_type,
       start_time,
       end_time,
       etag,