Remove obsolete methods from IPC::Channel and related classes.

content/public/common/sandboxed_process_launcher_delegate.h

Index: content/public/common/sandboxed_process_launcher_delegate.h
diff --git a/content/public/common/sandboxed_process_launcher_delegate.h b/content/public/common/sandboxed_process_launcher_delegate.h
index 9dfcb3267c034a12a7b02c544c57db449778804c..e14077648c6cc78f2668aaaaaca75ab06d0c6ada 100644
--- a/content/public/common/sandboxed_process_launcher_delegate.h
+++ b/content/public/common/sandboxed_process_launcher_delegate.h
@@ -61,9 +61,6 @@ class CONTENT_EXPORT SandboxedProcessLauncherDelegate {
 
   // Override this if the process needs a non-empty environment map.
   virtual base::EnvironmentMap GetEnvironment();
-
-  // Return the file descriptor for the IPC channel.
-  virtual base::ScopedFD TakeIpcFd() = 0;
 #endif
 
   // Returns the SandboxType to enforce on the process, or SANDBOX_TYPE_INVALID