Make QuicSimpleServerStream supports multipart response body

net/tools/quic/quic_in_memory_cache.h

Index: net/tools/quic/quic_in_memory_cache.h
diff --git a/net/tools/quic/quic_in_memory_cache.h b/net/tools/quic/quic_in_memory_cache.h
index 0cedc1e0f9af87cef694fa1d3cae746b6861dd6a..ea3384d3f6ea03486f942af0aa7140658ccc0537 100644
--- a/net/tools/quic/quic_in_memory_cache.h
+++ b/net/tools/quic/quic_in_memory_cache.h
@@ -8,6 +8,7 @@
 #include <map>
 #include <string>
 #include <unordered_map>
+#include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
@@ -59,6 +60,7 @@ class QuicInMemoryCache {
     REGULAR_RESPONSE,  // Send the headers and body like a server should.
     CLOSE_CONNECTION,  // Close the connection (sending the close packet).
     IGNORE_REQUEST,    // Do nothing, expect the client to time out.
+    BIDIRECTIONAL,     // Send headers, multiple chuncks of body and trailers.
   };
 
   // Container for response header/body pairs.
@@ -71,6 +73,7 @@ class QuicInMemoryCache {
     const SpdyHeaderBlock& headers() const { return headers_; }
     const SpdyHeaderBlock& trailers() const { return trailers_; }
     const base::StringPiece body() const { return base::StringPiece(body_); }
+    const std::vector<std::string>& body_chunks() const { return body_chunks_; }
 
     void set_response_type(SpecialResponseType response_type) {
       response_type_ = response_type;
@@ -78,12 +81,18 @@ class QuicInMemoryCache {
     void set_headers(const SpdyHeaderBlock& headers) { headers_ = headers; }
     void set_trailers(const SpdyHeaderBlock& trailers) { trailers_ = trailers; }
     void set_body(base::StringPiece body) { body.CopyToString(&body_); }
+    void SetBodyChunks(std::vector<std::string> body_chunks) {
+      for (auto i : body_chunks) {
+        body_chunks_.push_back(i);
+      }
+    }
 
    private:
     SpecialResponseType response_type_;
     SpdyHeaderBlock headers_;
     SpdyHeaderBlock trailers_;
     std::string body_;
+    std::vector<std::string> body_chunks_;
 
     DISALLOW_COPY_AND_ASSIGN(Response);
   };
@@ -103,6 +112,12 @@ class QuicInMemoryCache {
                          int response_code,
                          base::StringPiece body);
 
+  void AddBidirectionalResponse(StringPiece host,
+                                StringPiece path,
+                                int response_code,
+                                const std::vector<std::string>& body_chunks,
+                                const SpdyHeaderBlock& response_trailers);
+
   // Add a simple response to the cache as AddSimpleResponse() does, and add
   // some server push resources(resource path, corresponding response status and
   // path) associated with it.
@@ -160,6 +175,14 @@ class QuicInMemoryCache {
                        base::StringPiece response_body,
                        const SpdyHeaderBlock& response_trailers);
 
+  void AddResponseImpl(base::StringPiece host,
+                       base::StringPiece path,
+                       SpecialResponseType response_type,
+                       const SpdyHeaderBlock& response_headers,
+                       base::StringPiece response_body,
+                       const std::vector<std::string>& body_chunks,
+                       const SpdyHeaderBlock& response_trailers);
+
   string GetKey(base::StringPiece host, base::StringPiece path) const;
 
   // Add some server push urls with given responses for specified