Remove explicit JNI references by adding UrlRequest.readFromUploadChannel callback.

components/cronet/android/url_request_peer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_CRONET_ANDROID_URL_REQUEST_PEER_H_
 #define COMPONENTS_CRONET_ANDROID_URL_REQUEST_PEER_H_
 
 #include <jni.h>
 
 #include <string>
@@ skipping 19 matching lines @@
 // object.
 class URLRequestPeer : public net::URLRequest::Delegate {
  public:
   // The delegate which is called when the request finishes.
   class URLRequestPeerDelegate
       : public base::RefCountedThreadSafe<URLRequestPeerDelegate> {
    public:
     virtual void OnResponseStarted(URLRequestPeer* request) = 0;
     virtual void OnBytesRead(URLRequestPeer* request) = 0;
     virtual void OnRequestFinished(URLRequestPeer* request) = 0;
+    virtual int OnReadUploadData(net::IOBuffer* buf, int buf_length) = 0;
 
    protected:
     friend class base::RefCountedThreadSafe<URLRequestPeerDelegate>;
     virtual ~URLRequestPeerDelegate() {}
   };
 
   URLRequestPeer(URLRequestContextPeer* context,
                  URLRequestPeerDelegate* delegate,
                  GURL url,
                  net::RequestPriority priority);
   virtual ~URLRequestPeer();
 
   // Sets the request method GET, POST etc
   void SetMethod(const std::string& method);
 
   // Adds a header to the request
   void AddHeader(const std::string& name, const std::string& value);
 
   // Sets the contents of the POST or PUT request
   void SetUploadContent(const char* bytes, int bytes_len);
 
   // Sets the request to streaming upload.
-  void SetUploadChannel(JNIEnv* env, jobject content, int64 content_length);
+  void SetUploadChannel(JNIEnv* env, int64 content_length);
 
   // Starts the request.
   void Start();
 
   // Cancels the request.
   void Cancel();
 
   // Releases all resources for the request and deletes the object itself.
   void Destroy();
 
@@ skipping 62 matching lines @@
   std::string content_type_;
   bool canceled_;
   int64 expected_size_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestPeer);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_ANDROID_URL_REQUEST_PEER_H_