Using ResourceRequestBody as the type of HTTP body outside of //content.

content/public/common/resource_request_body.h

 // Copyright 2016 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 CONTENT_PUBLIC_COMMON_RESOURCE_REQUEST_BODY_H_
 #define CONTENT_PUBLIC_COMMON_RESOURCE_REQUEST_BODY_H_
 
 #include <stdint.h>
 
+#include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "build/build_config.h"
 #include "content/common/content_export.h"
 
+#if defined(OS_ANDROID)
+#include <jni.h>
+#include "base/android/scoped_java_ref.h"
+#endif
+
 namespace content {
 
 // ResourceRequestBody represents body (i.e. upload data) of a HTTP request.
 //
 // This class is intentionally opaque:
-// - Embedders cannot inspect the payload of ResourceRequestBody.  Only the
-//   //content layer can decompose ResourceRequestBody into references to file
-//   ranges, byte vectors, blob uris, etc.
-// - Embedders can get instances of ResourceRequestBody only by receiving an
-//   instance created inside //content layer (e.g. receiving it via
-//   content::OpenURLParams).
-// - Embedders typically end up passing ResourceRequestBody back into the
-//   //content layer via content::NavigationController::LoadUrlParams.
+// *) Embedders cannot inspect the payload of ResourceRequestBody.  Only the
+//    //content layer can decompose ResourceRequestBody into references to file
+//    ranges, byte vectors, blob uris, etc.
+// *) Embedders can get instances of ResourceRequestBody only by
+//    - receiving an instance created inside //content layer (e.g. receiving it
+//      via content::OpenURLParams),
+//    - calling CreateFromBytes with a vector of bytes (e.g. to support
+//      Android's WebView::postUrl API, to support DoSearchByImageInNewTab and
+//      to support test code).
+// *) Embedders typically end up passing ResourceRequestBody back into the
+//    //content layer via content::NavigationController::LoadUrlParams.
 class CONTENT_EXPORT ResourceRequestBody
     : public base::RefCountedThreadSafe<ResourceRequestBody> {
+ public:
+  // Creates ResourceRequestBody that holds a copy of |bytes|.
+  static scoped_refptr<ResourceRequestBody> CreateFromBytes(const char* bytes,
+                                                            size_t length);
+
+#if defined(OS_ANDROID)
+  // Returns a org.chromium.content_public.common.ResourceRequestBody Java
+  // object that wraps a ref-counted pointer to the |resource_request_body|.
+  base::android::ScopedJavaLocalRef<jobject> ToJavaObject(JNIEnv* env);
+
+  // Extracts and returns a C++ object out of Java's
+  // org.chromium.content_public.common.ResourceRequestBody.
+  static scoped_refptr<ResourceRequestBody> FromJavaObject(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& java_object);
+#endif
+
  protected:
   ResourceRequestBody();
   virtual ~ResourceRequestBody();
 
  private:
   friend class base::RefCountedThreadSafe<ResourceRequestBody>;
   DISALLOW_COPY_AND_ASSIGN(ResourceRequestBody);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_RESOURCE_REQUEST_BODY_H_