Remove GetInputStreamBufferSize() method from FilterContext.

net/base/sdch_filter.h

Index: net/base/sdch_filter.h
diff --git a/net/base/sdch_filter.h b/net/base/sdch_filter.h
index 9eac007d45ec23e2da7476c77eb14cc18faec627..451e918401b970aa107f168897b36efb29f54848 100644
--- a/net/base/sdch_filter.h
+++ b/net/base/sdch_filter.h
@@ -29,8 +29,6 @@ namespace net {
 
 class SdchFilter : public Filter {
  public:
-  explicit SdchFilter(const FilterContext& filter_context);
-
   virtual ~SdchFilter();
 
   // Initializes filter decoding mode and internal control blocks.
@@ -55,6 +53,10 @@ class SdchFilter : public Filter {
     PASS_THROUGH,  // Non-sdch content being passed without alteration.
   };
 
+  // Only to be instantiated by Filter::Factory.
+  explicit SdchFilter(const FilterContext& filter_context);
+  friend class Filter;
+
   // Identify the suggested dictionary, and initialize underlying decompressor.
   Filter::FilterStatus InitializeDictionary();