Tests for "Save Image As..." when Data Saver is enabled.

content/test/test_web_contents.cc

Index: content/test/test_web_contents.cc
diff --git a/content/test/test_web_contents.cc b/content/test/test_web_contents.cc
index 28c39801e8b8156197ccb2e036b1ee0a4bdf8aa9..26431327a47d02fb66459afcb3bf0a7eaa0a0133 100644
--- a/content/test/test_web_contents.cc
+++ b/content/test/test_web_contents.cc
@@ -111,6 +111,10 @@ void TestWebContents::TestDidNavigateWithReferrer(
   rfhi->frame_tree_node()->navigator()->DidNavigate(rfhi, params);
 }
 
+const std::string& TestWebContents::GetSaveFrameHeaders() {
+  return save_frame_headers_;
+}
+
 bool TestWebContents::CrossProcessNavigationPending() {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableBrowserSideNavigation)) {
@@ -285,4 +289,10 @@ void TestWebContents::ShowCreatedWidget(int route_id,
 void TestWebContents::ShowCreatedFullscreenWidget(int route_id) {
 }
 
+void TestWebContents::SaveFrameWithHeaders(const GURL& url,
+                                           const Referrer& referrer,
+                                           const std::string& headers) {
+  save_frame_headers_ = headers;
+}
+
 }  // namespace content