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

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 5deddb095e5b4822d2b51a5215e302d0597c4255..6f231b21e6bb19993161c28eaa7482bdf0b850db 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -340,6 +340,7 @@ class CONTENT_EXPORT WebContentsImpl
                             const Referrer& referrer,
                             const std::string& headers) override;
   void GenerateMHTML(const base::FilePath& file,
+                     bool use_binary_encoding,
                      const base::Callback<void(int64_t)>& callback) override;
   const std::string& GetContentsMimeType() const override;
   bool WillNotifyDisconnection() const override;