Offline Pages: Use 'binary encoding' to create MHTML, instead of base64.

content/browser/download/save_package.cc

Index: content/browser/download/save_package.cc
diff --git a/content/browser/download/save_package.cc b/content/browser/download/save_package.cc
index 1d32c9f15da1e4462103bb464740474976396a56..fbdd3891bd5f166e316a4de4b5c0f322459c2460 100644
--- a/content/browser/download/save_package.cc
+++ b/content/browser/download/save_package.cc
@@ -341,8 +341,9 @@ void SavePackage::InitWithDownloadItem(
     DCHECK(!saved_main_directory_path_.empty());
     GetSavableResourceLinks();
   } else if (save_type_ == SAVE_PAGE_TYPE_AS_MHTML) {
-    web_contents()->GenerateMHTML(saved_main_file_path_, base::Bind(
-        &SavePackage::OnMHTMLGenerated, this));
+    web_contents()->GenerateMHTML(
+        saved_main_file_path_, /* use_binary_encoding = */ false,
+        base::Bind(&SavePackage::OnMHTMLGenerated, this));
   } else {
     DCHECK_EQ(SAVE_PAGE_TYPE_AS_ONLY_HTML, save_type_);
     wait_state_ = NET_FILES;