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

android_webview/native/intercepted_request_data_impl.h

Index: android_webview/native/intercepted_request_data_impl.h
diff --git a/android_webview/native/intercepted_request_data_impl.h b/android_webview/native/intercepted_request_data_impl.h
index ecafaa76b4dd0577260900c25ba5cdfc6036456a..457bda94b56d4c2c887a7c85eec020db4a10291e 100644
--- a/android_webview/native/intercepted_request_data_impl.h
+++ b/android_webview/native/intercepted_request_data_impl.h
@@ -8,9 +8,12 @@
 #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
@@ -18,8 +21,7 @@ class InterceptedRequestDataImpl : public InterceptedRequestData {
   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;