[Offline Pages] Generate MHTML header in the browser process.

third_party/WebKit/Source/web/tests/MHTMLTest.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 135 matching lines @@
   static PassRefPtr<RawData> GenerateMHTMLData(
       const Vector<SerializedResource>& resources,
       MHTMLArchive::EncodingPolicy encoding_policy,
       const String& title,
       const String& mime_type) {
     // This boundary is as good as any other.  Plus it gets used in almost
     // all the examples in the MHTML spec - RFC 2557.
     String boundary = String::FromUTF8("boundary-example");
 
     RefPtr<RawData> mhtml_data = RawData::Create();
-    MHTMLArchive::GenerateMHTMLHeader(boundary, title, mime_type,
-                                      *mhtml_data->MutableData());
+    MHTMLArchive::GenerateMHTMLHeaderForTesting(boundary, title, mime_type,
+                                                *mhtml_data->MutableData());
     for (const auto& resource : resources) {
       MHTMLArchive::GenerateMHTMLPart(boundary, String(), encoding_policy,
                                       resource, *mhtml_data->MutableData());
     }
     MHTMLArchive::GenerateMHTMLFooterForTesting(boundary,
                                                 *mhtml_data->MutableData());
     return mhtml_data.Release();
   }
 
   PassRefPtr<RawData> Serialize(const char* title,
@@ skipping 111 matching lines @@
   // Full sandboxing should be turned on.
   EXPECT_TRUE(document->IsSandboxed(kSandboxAll));
 
   // MHTML document should be loaded into unique origin.
   EXPECT_TRUE(document->GetSecurityOrigin()->IsUnique());
   // Script execution should be disabled.
   EXPECT_FALSE(document->CanExecuteScripts(kNotAboutToExecuteScript));
 }
 
 }  // namespace blink