Mojo: Implement passing of shared buffers across processes on POSIX.

mojo/system/raw_shared_buffer_win.cc

 // Copyright 2014 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.
 
 #include "mojo/system/raw_shared_buffer.h"
 
 #include <windows.h>
 
 #include <limits>
 
@@ skipping 26 matching lines @@
       INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0,
       static_cast<DWORD>(num_bytes_), NULL)));
   if (!handle_.is_valid()) {
     PLOG(ERROR) << "CreateFileMapping";
     return false;
   }
 
   return true;
 }
 
+bool RawSharedBuffer::InitFromPlatformHandleNoLock(
+    embedder::ScopedPlatformHandle platform_handle) {
+  DCHECK(!handle_.is_valid());
+
+  // TODO(vtl): Implement.
+  NOTIMPLEMENTED();
+  return false;
+}
+
 scoped_ptr<RawSharedBufferMapping> RawSharedBuffer::MapImplNoLock(
     size_t offset,
     size_t length) {
   lock_.AssertAcquired();
 
   size_t offset_rounding = offset % base::SysInfo::VMAllocationGranularity();
   size_t real_offset = offset - offset_rounding;
   size_t real_length = length + offset_rounding;
 
   // This should hold (since we checked |num_bytes| versus the maximum value of
@@ skipping 16 matching lines @@
 
 // RawSharedBufferMapping ------------------------------------------------------
 
 void RawSharedBufferMapping::Unmap() {
   BOOL result = UnmapViewOfFile(real_base_);
   PLOG_IF(ERROR, !result) << "UnmapViewOfFile";
 }
 
 }  // namespace system
 }  // namespace mojo