Removes SpdyHeaderBlock::GetHeader(). No functional change. Not protected.

net/spdy/spdy_header_block.h

Index: net/spdy/spdy_header_block.h
diff --git a/net/spdy/spdy_header_block.h b/net/spdy/spdy_header_block.h
index 0ca81ba13414fe615927d7222f8081e0b5d11b27..e256b82540681cc62c6943c487186346a1dda459 100644
--- a/net/spdy/spdy_header_block.h
+++ b/net/spdy/spdy_header_block.h
@@ -106,11 +106,6 @@ class NET_EXPORT SpdyHeaderBlock {
   // Allows either lookup or mutation of the value associated with a key.
   ValueProxy operator[](const base::StringPiece key);
 
-  // Non-mutating lookup of header value. Returns empty StringPiece if key not
-  // present. To distinguish between absence of header and empty header value,
-  // use find().
-  base::StringPiece GetHeader(const base::StringPiece key) const;
-
   // This object provides automatic conversions that allow SpdyHeaderBlock to be
   // nearly a drop-in replacement for linked_hash_map<string, string>. It reads
   // data from or writes data to a SpdyHeaderBlock::Storage.