Remove Windows support from the EDK.

mojo/edk/embedder/platform_channel_pair.h

 // 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.
 
 #ifndef MOJO_EDK_EMBEDDER_PLATFORM_CHANNEL_PAIR_H_
 #define MOJO_EDK_EMBEDDER_PLATFORM_CHANNEL_PAIR_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process/launch.h"
-#include "build/build_config.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace base {
 class CommandLine;
 }
 
 namespace mojo {
 namespace embedder {
 
 // It would be nice to refactor base/process/launch.h to have a more platform-
 // independent way of representing handles that are passed to child processes.
-#if defined(OS_WIN)
-using HandlePassingInformation = base::HandlesToInheritVector;
-#elif defined(OS_POSIX)
 using HandlePassingInformation = base::FileHandleMappingVector;
-#else
-#error "Unsupported."
-#endif
 
 // This is used to create a pair of |PlatformHandle|s that are connected by a
-// suitable (platform-specific) bidirectional "pipe" (e.g., socket on POSIX,
-// named pipe on Windows). The resulting handles can then be used in the same
-// process (e.g., in tests) or between processes. (The "server" handle is the
-// one that will be used in the process that created the pair, whereas the
-// "client" handle is the one that will be used in a different process.)
+// suitable (platform-specific) bidirectional "pipe" (e.g., Unix domain socket).
+// The resulting handles can then be used in the same process (e.g., in tests)
+// or between processes. (The "server" handle is the one that will be used in
+// the process that created the pair, whereas the "client" handle is the one
+// that will be used in a different process.)
 //
 // This class provides facilities for passing the client handle to a child
 // process. The parent should call |PrepareToPassClientHandlelToChildProcess()|
 // to get the data needed to do this, spawn the child using that data, and then
-// call |ChildProcessLaunched()|. Note that on Windows this facility (will) only
-// work on Vista and later (TODO(vtl)).
+// call |ChildProcessLaunched()|.
 //
 // Note: |PlatformChannelPair()|, |PassClientHandleFromParentProcess()| and
 // |PrepareToPassClientHandleToChildProcess()| have platform-specific
 // implementations.
 //
 // Note: On POSIX platforms, to write to the "pipe", use
 // |PlatformChannel{Write,Writev}()| (from platform_channel_utils_posix.h)
 // instead of |write()|, |writev()|, etc. Otherwise, you have to worry about
 // platform differences in suppressing |SIGPIPE|.
 class MOJO_SYSTEM_IMPL_EXPORT PlatformChannelPair {
  public:
   PlatformChannelPair();
   ~PlatformChannelPair();
 
   ScopedPlatformHandle PassServerHandle();
 
   // For in-process use (e.g., in tests or to pass over another channel).
   ScopedPlatformHandle PassClientHandle();
 
   // To be called in the child process, after the parent process called
   // |PrepareToPassClientHandleToChildProcess()| and launched the child (using
   // the provided data), to create a client handle connected to the server
   // handle (in the parent process).
   static ScopedPlatformHandle PassClientHandleFromParentProcess(
       const base::CommandLine& command_line);
 
   // Prepares to pass the client channel to a new child process, to be launched
   // using |LaunchProcess()| (from base/launch.h). Modifies |*command_line| and
   // |*handle_passing_info| as needed.
-  // Note: For Windows, this method only works on Vista and later.
   void PrepareToPassClientHandleToChildProcess(
       base::CommandLine* command_line,
       HandlePassingInformation* handle_passing_info) const;
 
   // To be called once the child process has been successfully launched, to do
   // any cleanup necessary.
   void ChildProcessLaunched();
 
  private:
   static const char kMojoPlatformChannelHandleSwitch[];
 
   ScopedPlatformHandle server_handle_;
   ScopedPlatformHandle client_handle_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(PlatformChannelPair);
 };
 
 }  // namespace embedder
 }  // namespace mojo
 
 #endif  // MOJO_EDK_EMBEDDER_PLATFORM_CHANNEL_PAIR_H_