Get signals working in the EXTRA_DATA section of MHTML

content/browser/download/mhtml_generation_browsertest.cc

Index: content/browser/download/mhtml_generation_browsertest.cc
diff --git a/content/browser/download/mhtml_generation_browsertest.cc b/content/browser/download/mhtml_generation_browsertest.cc
index 6adf1212067e82662735802eb6ae34847e5b2cad..8f847f2c5a6378367df1e903d6463f575bb59e17 100644
--- a/content/browser/download/mhtml_generation_browsertest.cc
+++ b/content/browser/download/mhtml_generation_browsertest.cc
@@ -17,6 +17,7 @@
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/common/frame_messages.h"
+#include "content/public/browser/mhtml_extra_data.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/mhtml_generation_params.h"
@@ -672,4 +673,43 @@ IN_PROC_BROWSER_TEST_F(MHTMLGenerationTest, RemovePopupOverlay) {
   EXPECT_THAT(mhtml, Not(HasSubstr("class=3D\"modal")));
 }
 
+IN_PROC_BROWSER_TEST_F(MHTMLGenerationTest, GenerateMHTMLWithExtraData) {
+  const char kFakeSignalData1[] = "FakeSignalData1";
+  const char kFakeSignalData2[] = "OtherMockDataForSignals";
+  const char kFakeContentType[] = "text/plain";
+  const char kFakeContentLocation[] =
+      "cid:signal-data-62691-645341c4-62b3-478e-a8c5-e0dfccc3ca02@mhtml.blink";
+  base::FilePath path(temp_dir_.GetPath());
+  path = path.Append(FILE_PATH_LITERAL("test.mht"));
+  GURL url(embedded_test_server()->GetURL("/page_with_image.html"));
+  MHTMLGenerationParams params(path);
+
+  // Place the extra data we need into the web contents user data.
+  std::string signal_data1(kFakeSignalData1);
+  std::string signal_data2(kFakeSignalData2);
+  std::string content_type(kFakeContentType);
+  std::string content_location(kFakeContentLocation);
+
+  // Get the MHTMLExtraData
+  MHTMLExtraData* extra_data =
+      MHTMLExtraData::FromWebContents(shell()->web_contents());
+
+  // Add two extra data parts to the MHTML.
+  extra_data->AddExtraMHTMLPart(content_type, content_location, signal_data1);
+  extra_data->AddExtraMHTMLPart(content_type, content_location, signal_data2);
+  GenerateMHTML(params, url);
+
+  EXPECT_TRUE(has_mhtml_callback_run());
+
+  std::string mhtml;
+  {
+    base::ThreadRestrictions::ScopedAllowIO allow_io_for_content_verification;
+    ASSERT_TRUE(base::ReadFileToString(path, &mhtml));
+  }
+
+  // Make sure that both extra data parts made it into the mhtml.
+  EXPECT_THAT(mhtml, HasSubstr(kFakeSignalData1));
+  EXPECT_THAT(mhtml, HasSubstr(kFakeSignalData2));
+}
+
 }  // namespace content