Unifying ChildProcessLauncher across platforms.

content/public/browser/file_descriptor_info.h

Index: content/public/browser/file_descriptor_info.h
diff --git a/content/public/browser/file_descriptor_info.h b/content/public/browser/file_descriptor_info.h
index 4fc686b538e51f9ca5329ec535eb3c09ca546e02..c3756a16c3e2494d2437cffac759dfd3c502601c 100644
--- a/content/public/browser/file_descriptor_info.h
+++ b/content/public/browser/file_descriptor_info.h
@@ -7,6 +7,8 @@
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/files/file.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/process/launch.h"
@@ -21,7 +23,7 @@ namespace content {
 class FileDescriptorInfo {
  public:
   virtual ~FileDescriptorInfo() {}
-
+#if !defined(OS_WIN)
   // Adds an FD associated with an ID, without delegating the ownerhip of ID.
   virtual void Share(int id, base::PlatformFile fd) = 0;
 
@@ -41,8 +43,8 @@ class FileDescriptorInfo {
 
   // A GetMapping() variant that adjusts the ID value by |delta|.
   // Some environments need this trick.
-  virtual base::FileHandleMappingVector GetMappingWithIDAdjustment(
-      int delta) const = 0;
+  virtual std::unique_ptr<base::FileHandleMappingVector>
+  GetMappingWithIDAdjustment(int delta) const = 0;
 
   // API for iterating over the registered ID-FD pairs.
   virtual base::PlatformFile GetFDAt(size_t i) const = 0;
@@ -54,6 +56,7 @@ class FileDescriptorInfo {
   virtual bool OwnsFD(base::PlatformFile file) const = 0;
   // Assuming |OwnsFD(file)|, releases the ownership.
   virtual base::ScopedFD ReleaseFD(base::PlatformFile file) = 0;
+#endif  // !defined(OS_WIN)
 };
 
 }