Lift the 64K message size limit for postMessage to/from NativeClient.

ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_input_event.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_input_event.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_input_event.cc	(revision 117568)
+++ ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_input_event.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -86,7 +86,7 @@
   DCHECK((character_text.type == PP_VARTYPE_UNDEFINED) ||
          (character_text.type == PP_VARTYPE_STRING));
   // Serialize the character_text Var.
-  uint32_t text_size = kMaxVarSize;
+  uint32_t text_size = 0;
   nacl::scoped_array<char> text_bytes(Serialize(&character_text, 1,
                                                 &text_size));
   int32_t handled;