Simplify CombineFrames() interface.

net/spdy/chromium/spdy_test_util_common.h

Index: net/spdy/chromium/spdy_test_util_common.h
diff --git a/net/spdy/chromium/spdy_test_util_common.h b/net/spdy/chromium/spdy_test_util_common.h
index be5f42945c89cdf1a9772faf5813eefa4c9291c5..82e5a56c9c9f611e2239dec8c5298b1beaf7fec3 100644
--- a/net/spdy/chromium/spdy_test_util_common.h
+++ b/net/spdy/chromium/spdy_test_util_common.h
@@ -90,12 +90,9 @@ MockRead CreateMockRead(const SpdySerializedFrame& resp, int seq);
 
 MockRead CreateMockRead(const SpdySerializedFrame& resp, int seq, IoMode mode);
 
-// Combines the given SpdySerializedFrame into the given char array and returns
-// the total length.
-int CombineFrames(const SpdySerializedFrame** frames,
-                  int num_frames,
-                  char* buf,
-                  int buf_len);
+// Combines the given vector of SpdySerializedFrame into a single frame.
+SpdySerializedFrame CombineFrames(
+    std::vector<const SpdySerializedFrame*> frames);
 
 // Returns the SpdyPriority embedded in the given frame.  Returns true
 // and fills in |priority| on success.