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

android_webview/native/aw_contents.cc

Index: android_webview/native/aw_contents.cc
diff --git a/android_webview/native/aw_contents.cc b/android_webview/native/aw_contents.cc
index 707e7cdaf25b92d4da8ea01678aacadaf1c4cc39..f23ef639933985ac2c70c40c65c70aabeb72bee9 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -411,6 +411,7 @@ void AwContents::GenerateMHTML(JNIEnv* env,
   base::FilePath target_path(ConvertJavaStringToUTF8(env, jpath));
   web_contents_->GenerateMHTML(
       target_path,
+      false /* use_binary_encoding */,
       base::Bind(&GenerateMHTMLCallback, base::Owned(j_callback), target_path));
 }