[PresentationAPI] Implementing send() from WebPresentationClient to the PresentationService.

content/public/common/presentation_constants.cc

Index: content/public/common/presentation_constants.cc
diff --git a/ipc/ipc_message_attachment.cc b/content/public/common/presentation_constants.cc
similarity index 50%
copy from ipc/ipc_message_attachment.cc
copy to content/public/common/presentation_constants.cc
index 83440ae8e008847eebd411f8ffd08c69d9f529fe..4174f65dfe74186111d137ff533503e3732bb586 100644
--- a/ipc/ipc_message_attachment.cc
+++ b/content/public/common/presentation_constants.cc
@@ -2,14 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ipc/ipc_message_attachment.h"
+#include "content/public/common/presentation_constants.h"
 
-namespace IPC {
+namespace content {
 
-MessageAttachment::MessageAttachment() {
-}
+const size_t kMaxPresentationSessionMessageSize = 64 * 1024; // 64 KB.
 
-MessageAttachment::~MessageAttachment() {
-}
-
-}  // namespace IPC
+}  // namespace content