Remove IPC::Channel::TakePipeHandle()

It doesn't work, and it is no longer used.

BUG=416208
R=cpu@chromium.org, jam@chromium.org

Review URL: https://codereview.chromium.org/601563002

Cr-Commit-Position: refs/heads/master@{#296820}

ipc/ipc_channel.h

@@ -173,11 +173,6 @@ class IPC_EXPORT Channel : public Sender {
   // Get its own process id. This value is told to the peer.
   virtual base::ProcessId GetSelfPID() const = 0;
 
-  // Return connected ChannelHandle which the channel has owned.
-  // This method transfers the ownership to the caller
-  // so the channel isn't valid after the call.
-  virtual ChannelHandle TakePipeHandle() WARN_UNUSED_RESULT = 0;
-
   // Send a message over the Channel to the listener on the other end.
   //
   // |message| must be allocated using operator new.  This object will be

ipc/ipc_channel_nacl.cc

@@ -149,11 +149,6 @@ base::ProcessId ChannelNacl::GetSelfPID() const {
   return -1;
 }
 
-ChannelHandle ChannelNacl::TakePipeHandle() {
-  // NACL doesn't have any platform-level handles.
-  return ChannelHandle();
-}
-
 bool ChannelNacl::Connect() {
   if (pipe_ == -1) {
     DLOG(WARNING) << "Channel creation failed: " << pipe_name_;

ipc/ipc_channel_nacl.h

@@ -43,7 +43,6 @@ class ChannelNacl : public Channel,
   // Channel implementation.
   virtual base::ProcessId GetPeerPID() const OVERRIDE;
   virtual base::ProcessId GetSelfPID() const OVERRIDE;
-  virtual ChannelHandle TakePipeHandle() OVERRIDE;
   virtual bool Connect() OVERRIDE;
   virtual void Close() OVERRIDE;
   virtual bool Send(Message* message) OVERRIDE;

ipc/ipc_channel_posix.cc

@@ -1052,13 +1052,6 @@ base::ProcessId ChannelPosix::GetSelfPID() const {
   return GetHelloMessageProcId();
 }
 
-ChannelHandle ChannelPosix::TakePipeHandle() {
-  ChannelHandle handle = ChannelHandle(pipe_name_,
-                                       base::FileDescriptor(pipe_, false));
-  pipe_ = -1;
-  return handle;
-}
-
 //------------------------------------------------------------------------------
 // Channel's methods
 

ipc/ipc_channel_posix.h

@@ -63,7 +63,6 @@ class IPC_EXPORT ChannelPosix : public Channel,
   virtual bool Send(Message* message) OVERRIDE;
   virtual base::ProcessId GetPeerPID() const OVERRIDE;
   virtual base::ProcessId GetSelfPID() const OVERRIDE;
-  virtual ChannelHandle TakePipeHandle() OVERRIDE;
   virtual int GetClientFileDescriptor() const OVERRIDE;
   virtual int TakeClientFileDescriptor() OVERRIDE;
 

ipc/ipc_channel_win.cc

@@ -144,12 +144,6 @@ base::ProcessId ChannelWin::GetSelfPID() const {
   return GetCurrentProcessId();
 }
 
-ChannelHandle ChannelWin::TakePipeHandle() {
-  ChannelHandle handle = ChannelHandle(pipe_);
-  pipe_ = INVALID_HANDLE_VALUE;
-  return handle;
-}
-
 // static
 bool ChannelWin::IsNamedServerInitialized(
     const std::string& channel_id) {

ipc/ipc_channel_win.h

@@ -36,7 +36,6 @@ class ChannelWin : public Channel,
   virtual bool Send(Message* message) OVERRIDE;
   virtual base::ProcessId GetPeerPID() const OVERRIDE;
   virtual base::ProcessId GetSelfPID() const OVERRIDE;
-  virtual ChannelHandle TakePipeHandle() OVERRIDE;
 
   static bool IsNamedServerInitialized(const std::string& channel_id);
 

ipc/ipc_test_sink.cc

@@ -40,11 +40,6 @@ base::ProcessId TestSink::GetSelfPID() const {
   return base::ProcessId();
 }
 
-ChannelHandle TestSink::TakePipeHandle() {
-  NOTIMPLEMENTED();
-  return ChannelHandle();
-}
-
 bool TestSink::OnMessageReceived(const Message& msg) {
   ObserverListBase<Listener>::Iterator it(filter_list_);
   Listener* observer;

ipc/ipc_test_sink.h

@@ -82,7 +82,6 @@ class TestSink : public Channel {
   virtual void Close() OVERRIDE;
   virtual base::ProcessId GetPeerPID() const OVERRIDE;
   virtual base::ProcessId GetSelfPID() const OVERRIDE;
-  virtual ChannelHandle TakePipeHandle() OVERRIDE;
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
   virtual int GetClientFileDescriptor() const OVERRIDE;

ipc/mojo/ipc_channel_mojo.cc

@@ -191,11 +191,6 @@ base::ProcessId ChannelMojo::GetSelfPID() const {
   return base::GetCurrentProcId();
 }
 
-ChannelHandle ChannelMojo::TakePipeHandle() {
-  NOTREACHED();
-  return ChannelHandle();
-}
-
 void ChannelMojo::OnClientLaunched(base::ProcessHandle handle) {
   bootstrap_->OnClientLaunched(handle);
 }

ipc/mojo/ipc_channel_mojo.h

@@ -89,7 +89,6 @@ class IPC_MOJO_EXPORT ChannelMojo : public Channel,
   virtual bool Send(Message* message) OVERRIDE;
   virtual base::ProcessId GetPeerPID() const OVERRIDE;
   virtual base::ProcessId GetSelfPID() const OVERRIDE;
-  virtual ChannelHandle TakePipeHandle() OVERRIDE;
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
   virtual int GetClientFileDescriptor() const OVERRIDE;