FBTF: Even more ctor/virtual deinlining.

chrome/browser/autofill/autofill_download.h

Index: chrome/browser/autofill/autofill_download.h
diff --git a/chrome/browser/autofill/autofill_download.h b/chrome/browser/autofill/autofill_download.h
index c2f0ba095e3da9769d87330a87f7a4e8faaf54fc..8b31492be372820efd0658670e14bc4a64d5757a 100644
--- a/chrome/browser/autofill/autofill_download.h
+++ b/chrome/browser/autofill/autofill_download.h
@@ -92,10 +92,8 @@ class AutoFillDownloadManager : public URLFetcher::Delegate {
 
  private:
   friend class AutoFillDownloadTestHelper;  // unit-test.
-  struct FormRequestData {
-    std::vector<std::string> form_signatures;
-    AutoFillRequestType request_type;
-  };
+
+  struct FormRequestData;
 
   // Initiates request to AutoFill servers to download/upload heuristics.
   // |form_xml| - form structure XML to upload/download.