[android_webview] Don't block the IO thread when reading from an InputStream.

android_webview/native/intercepted_request_data_impl.h

 // Copyright (c) 2012 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_NATIVE_INTERCEPTED_REQUEST_DATA_IMPL_H_
 #define ANDROID_WEBVIEW_NATIVE_INTERCEPTED_REQUEST_DATA_IMPL_H_
 
 #include "android_webview/browser/intercepted_request_data.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
 
 namespace android_webview {
 
+class InputStream;
+
 class InterceptedRequestDataImpl : public InterceptedRequestData {
  public:
   // It is expected that |obj| is an instance of the Java-side
   // org.chromium.android_webview.InterceptedRequestData class.
   InterceptedRequestDataImpl(const base::android::JavaRef<jobject>& obj);
   virtual ~InterceptedRequestDataImpl();
 
-  virtual base::android::ScopedJavaLocalRef<jobject>
-      GetInputStream(JNIEnv* env) const;
+  virtual scoped_ptr<InputStream> GetInputStream(JNIEnv* env) const;
   virtual bool GetMimeType(JNIEnv* env, std::string* mime_type) const;
   virtual bool GetCharset(JNIEnv* env, std::string* charset) const;
 
   virtual net::URLRequestJob* CreateJobFor(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) const OVERRIDE;
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> java_object_;
 
   DISALLOW_COPY_AND_ASSIGN(InterceptedRequestDataImpl);
 };
 
 bool RegisterInterceptedRequestData(JNIEnv* env);
 
 } // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_INTERCEPTED_REQUEST_DATA_IMPL_H_