ipc: Rename TakeFileHandleForProcess->TakePlatformFileForTransit.

This CL has no intended behavior change. This CL also removes the now
unnecessary parameter |process|.

BUG=493414

Review URL: https://codereview.chromium.org/1862333002

Cr-Commit-Position: refs/heads/master@{#385781}
diff --git a/ipc/ipc_platform_file.cc b/ipc/ipc_platform_file.cc
index 2dcc9aa..dbcfddc 100644
--- a/ipc/ipc_platform_file.cc
+++ b/ipc/ipc_platform_file.cc
@@ -44,8 +44,7 @@
 #endif
 }
 
-PlatformFileForTransit TakeFileHandleForProcess(base::File file,
-                                                base::ProcessHandle process) {
+PlatformFileForTransit TakePlatformFileForTransit(base::File file) {
   return GetPlatformFileForTransit(file.TakePlatformFile(), true);
 }