Remove |using base::StringPiece| from net/spdy header files.

net/spdy/hpack/hpack_header_table.h

Index: net/spdy/hpack/hpack_header_table.h
diff --git a/net/spdy/hpack/hpack_header_table.h b/net/spdy/hpack/hpack_header_table.h
index e60a758ce7992f62198afddef5e516cda6f744f6..881bb7cf4f81c3572254948bf6c32bea9132c3ea 100644
--- a/net/spdy/hpack/hpack_header_table.h
+++ b/net/spdy/hpack/hpack_header_table.h
@@ -18,8 +18,6 @@
 
 namespace net {
 
-using base::StringPiece;
-
 namespace test {
 class HpackHeaderTablePeer;
 }  // namespace test
@@ -62,10 +60,11 @@ class NET_EXPORT_PRIVATE HpackHeaderTable {
   const HpackEntry* GetByIndex(size_t index);
 
   // Returns the lowest-value entry having |name|, or NULL.
-  const HpackEntry* GetByName(StringPiece name);
+  const HpackEntry* GetByName(base::StringPiece name);
 
   // Returns the lowest-index matching entry, or NULL.
-  const HpackEntry* GetByNameAndValue(StringPiece name, StringPiece value);
+  const HpackEntry* GetByNameAndValue(base::StringPiece name,
+                                      base::StringPiece value);
 
   // Returns the index of an entry within this header table.
   size_t IndexOf(const HpackEntry* entry) const;
@@ -81,8 +80,8 @@ class NET_EXPORT_PRIVATE HpackHeaderTable {
   // Determine the set of entries which would be evicted by the insertion
   // of |name| & |value| into the table, as per section 4.4. No eviction
   // actually occurs. The set is returned via range [begin_out, end_out).
-  void EvictionSet(StringPiece name,
-                   StringPiece value,
+  void EvictionSet(base::StringPiece name,
+                   base::StringPiece value,
                    EntryTable::iterator* begin_out,
                    EntryTable::iterator* end_out);
 
@@ -90,13 +89,15 @@ class NET_EXPORT_PRIVATE HpackHeaderTable {
   // and |value| must not be owned by an entry which could be evicted. The
   // added HpackEntry is returned, or NULL is returned if all entries were
   // evicted and the empty table is of insufficent size for the representation.
-  const HpackEntry* TryAddEntry(StringPiece name, StringPiece value);
+  const HpackEntry* TryAddEntry(base::StringPiece name,
+                                base::StringPiece value);
 
   void DebugLogTableState() const;
 
  private:
   // Returns number of evictions required to enter |name| & |value|.
-  size_t EvictionCountForEntry(StringPiece name, StringPiece value) const;
+  size_t EvictionCountForEntry(base::StringPiece name,
+                               base::StringPiece value) const;
 
   // Returns number of evictions required to reclaim |reclaim_size| table size.
   size_t EvictionCountToReclaim(size_t reclaim_size) const;