make SetReceiveBufferSize and SetSendBufferSize return net error codes (instead of bools)

jingle/glue/pseudotcp_adapter_unittest.cc

Index: jingle/glue/pseudotcp_adapter_unittest.cc
diff --git a/jingle/glue/pseudotcp_adapter_unittest.cc b/jingle/glue/pseudotcp_adapter_unittest.cc
index 7d1870ca4fa23291479b73084910211f50df6632..e2329f8b345eded80604bfa17384d1ed404f09d6 100644
--- a/jingle/glue/pseudotcp_adapter_unittest.cc
+++ b/jingle/glue/pseudotcp_adapter_unittest.cc
@@ -142,13 +142,13 @@ class FakeSocket : public net::Socket {
     return buf_len;
   }
 
-  virtual bool SetReceiveBufferSize(int32 size) OVERRIDE {
+  virtual int SetReceiveBufferSize(int32 size) OVERRIDE {
     NOTIMPLEMENTED();
-    return false;
+    return net::ERR_NOT_IMPLEMENTED;
   }
-  virtual bool SetSendBufferSize(int32 size) OVERRIDE {
+  virtual int SetSendBufferSize(int32 size) OVERRIDE {
     NOTIMPLEMENTED();
-    return false;
+    return net::ERR_NOT_IMPLEMENTED;
   }
 
  private: