Add a Mojo EDK for Chrome that uses one OS pipe per message pipe.

mojo/edk/system/mapping_table.h

Index: mojo/edk/system/mapping_table.h
diff --git a/third_party/mojo/src/mojo/edk/system/mapping_table.h b/mojo/edk/system/mapping_table.h
similarity index 69%
copy from third_party/mojo/src/mojo/edk/system/mapping_table.h
copy to mojo/edk/system/mapping_table.h
index cc74acae02dbe6edcb9cd525c7282fbea8a4bdc9..fb2acf365fec3df16ce782557653326fbf5a32e6 100644
--- a/third_party/mojo/src/mojo/edk/system/mapping_table.h
+++ b/mojo/edk/system/mapping_table.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_MAPPING_TABLE_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_MAPPING_TABLE_H_
+#ifndef MOJO_EDK_SYSTEM_MAPPING_TABLE_H_
+#define MOJO_EDK_SYSTEM_MAPPING_TABLE_H_
 
 #include <stdint.h>
 
@@ -11,19 +11,15 @@
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
+#include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/c/system/types.h"
 #include "mojo/public/cpp/system/macros.h"
-#include "third_party/mojo/src/mojo/edk/system/system_impl_export.h"
 
 namespace mojo {
 
-namespace embedder {
-class PlatformSharedBufferMapping;
-}
-
-namespace system {
-
+namespace edk {
 class Core;
+class PlatformSharedBufferMapping;
 
 // Test-only function (defined/used in embedder/test_embedder.cc). Declared here
 // so it can be friended.
@@ -42,21 +38,20 @@ class MOJO_SYSTEM_IMPL_EXPORT MappingTable {
 
   // Tries to add a mapping. (Takes ownership of the mapping in all cases; on
   // failure, it will be destroyed.)
-  MojoResult AddMapping(
-      scoped_ptr<embedder::PlatformSharedBufferMapping> mapping);
-  MojoResult RemoveMapping(uintptr_t address);
+  MojoResult AddMapping(scoped_ptr<PlatformSharedBufferMapping> mapping);
+  MojoResult RemoveMapping(void* address);
 
  private:
   friend bool internal::ShutdownCheckNoLeaks(Core*);
 
   using AddressToMappingMap =
-      base::hash_map<uintptr_t, embedder::PlatformSharedBufferMapping*>;
+      base::hash_map<void*, PlatformSharedBufferMapping*>;
   AddressToMappingMap address_to_mapping_map_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(MappingTable);
 };
 
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo
 
-#endif  // THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_MAPPING_TABLE_H_
+#endif  // MOJO_EDK_SYSTEM_MAPPING_TABLE_H_