Added new histogram for analyzing SDCH corruption detection cases.

net/filter/mock_filter_context.cc

Index: net/filter/mock_filter_context.cc
diff --git a/net/filter/mock_filter_context.cc b/net/filter/mock_filter_context.cc
index ddf9fdc05fcbe5bd560cf3a31439fbfdf4a50748..e1e47939c4abdf1e34cee8c58a2b2229029f53a9 100644
--- a/net/filter/mock_filter_context.cc
+++ b/net/filter/mock_filter_context.cc
@@ -54,7 +54,9 @@ bool MockFilterContext::IsCachedContent() const { return is_cached_content_; }
 
 bool MockFilterContext::IsDownload() const { return is_download_; }
 
-bool MockFilterContext::IsSdchResponse() const { return is_sdch_response_; }
+bool MockFilterContext::SdchResponseExpected() const {
+  return is_sdch_response_;
+}
 
 int64 MockFilterContext::GetByteReadCount() const { return 0; }