Merge ResourceRequestBodyImpl and ResourceRequestBody.

content/public/common/page_state.cc

Index: content/public/common/page_state.cc
diff --git a/content/public/common/page_state.cc b/content/public/common/page_state.cc
index 5c58920a114410885a7bd325f0bc2b988510f627..add79b7639b3bf655d36aa6ae5100ef7836fc4e8 100644
--- a/content/public/common/page_state.cc
+++ b/content/public/common/page_state.cc
@@ -10,6 +10,7 @@
 #include "base/strings/nullable_string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/common/page_state_serialization.h"
+#include "content/public/common/resource_request_body.h"
 
 namespace content {
 namespace {
@@ -85,12 +86,12 @@ PageState PageState::CreateForTesting(
   if (optional_body_data || optional_body_file_path) {
     if (optional_body_data) {
       std::string body_data(optional_body_data);
-      state.top.http_body.request_body = new ResourceRequestBodyImpl();
+      state.top.http_body.request_body = new ResourceRequestBody();
       state.top.http_body.request_body->AppendBytes(body_data.data(),
                                                     body_data.size());
     }
     if (optional_body_file_path) {
-      state.top.http_body.request_body = new ResourceRequestBodyImpl();
+      state.top.http_body.request_body = new ResourceRequestBody();
       state.top.http_body.request_body->AppendFileRange(
           *optional_body_file_path,
           0, std::numeric_limits<uint64_t>::max(),