[WebView] Replace AwContentsIoThreadClient, InputStream and AwWebResourceResponse

android_webview/browser/net/aw_web_resource_response.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 ANDROID_WEBVIEW_BROWSER_NET_AW_WEB_RESOURCE_RESPONSE_H_
 #define ANDROID_WEBVIEW_BROWSER_NET_AW_WEB_RESOURCE_RESPONSE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/compiler_specific.h"
 #include "base/macros.h"
 
 namespace net {
 class HttpResponseHeaders;
 class URLRequest;
 }
 
 namespace android_webview {
 
 class InputStream;
 
 // This class represents the Java-side data that is to be used to complete a
 // particular URLRequest.
 class AwWebResourceResponse {
  public:
-  virtual ~AwWebResourceResponse() {}
+  // It is expected that |obj| is an instance of the Java-side
+  // org.chromium.android_webview.AwWebResourceResponse class.
+  AwWebResourceResponse(const base::android::JavaRef<jobject>& obj);
+  ~AwWebResourceResponse();
 
-  virtual std::unique_ptr<InputStream> GetInputStream(JNIEnv* env) const = 0;
-  virtual bool GetMimeType(JNIEnv* env, std::string* mime_type) const = 0;
-  virtual bool GetCharset(JNIEnv* env, std::string* charset) const = 0;
-  virtual bool GetStatusInfo(JNIEnv* env,
-                             int* status_code,
-                             std::string* reason_phrase) const = 0;
+  std::unique_ptr<InputStream> GetInputStream(JNIEnv* env) const;
+  bool GetMimeType(JNIEnv* env, std::string* mime_type) const;
+  bool GetCharset(JNIEnv* env, std::string* charset) const;
+  bool GetStatusInfo(JNIEnv* env,
+                     int* status_code,
+                     std::string* reason_phrase) const;
   // If true is returned then |headers| contain the headers, if false is
   // returned |headers| were not updated.
-  virtual bool GetResponseHeaders(
-      JNIEnv* env,
-      net::HttpResponseHeaders* headers) const = 0;
-
- protected:
-  AwWebResourceResponse() {}
+  bool GetResponseHeaders(JNIEnv* env, net::HttpResponseHeaders* headers) const;
 
  private:
+  AwWebResourceResponse();
+
+  base::android::ScopedJavaGlobalRef<jobject> java_object_;
+
   DISALLOW_COPY_AND_ASSIGN(AwWebResourceResponse);
 };
 
 } // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_NET_AW_WEB_RESOURCE_RESPONSE_H_