Introduces a new MHTML generation parameter specifying different behvaior for cache-control headers.

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 44073fe3bc5c0e6c30afeba607a0fe80ecc41769..0da570e7277d919ea4e66f6055b9594dcc496eef 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -68,6 +68,7 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/mhtml_generation_params.h"
 #include "content/public/common/renderer_preferences.h"
 #include "content/public/common/ssl_status.h"
 #include "jni/AwContents_jni.h"
@@ -403,8 +404,7 @@ void AwContents::GenerateMHTML(JNIEnv* env,
   j_callback->Reset(env, callback);
   base::FilePath target_path(ConvertJavaStringToUTF8(env, jpath));
   web_contents_->GenerateMHTML(
-      target_path,
-      false /* use_binary_encoding */,
+      content::MHTMLGenerationParams(target_path),
       base::Bind(&GenerateMHTMLCallback, base::Owned(j_callback), target_path));
 }