Move the writing of the MHTML footer to the browser process.

third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp

Index: third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp
diff --git a/third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp b/third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp
index 826e20f1d6357ff274d21d1ee1452564a61872a7..2261ed1321d2ec9627e584a264f4645e0838d7ab 100644
--- a/third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp
+++ b/third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp
@@ -246,8 +246,8 @@ void MHTMLArchive::generateMHTMLPart(const String& boundary,
   }
 }
 
-void MHTMLArchive::generateMHTMLFooter(const String& boundary,
-                                       Vector<char>& outputBuffer) {
+void MHTMLArchive::generateMHTMLFooterForTesting(const String& boundary,
+                                                 Vector<char>& outputBuffer) {
   ASSERT(!boundary.isEmpty());
   CString asciiString = String("--" + boundary + "--\r\n").utf8();
   outputBuffer.append(asciiString.data(), asciiString.length());