[Aura] Added Support for rendering software compositor frames as cc::TextureLayers.

base/memory/shared_memory.h

Index: base/memory/shared_memory.h
diff --git a/base/memory/shared_memory.h b/base/memory/shared_memory.h
index 7f19bd71ca10872599e1f407ff523a9d02b0e155..d846ca8d374efe3cd8724568f229579576b66064 100644
--- a/base/memory/shared_memory.h
+++ b/base/memory/shared_memory.h
@@ -98,6 +98,9 @@ class BASE_EXPORT SharedMemory {
   // Returns invalid handle (see comment above for exact definition).
   static SharedMemoryHandle NULLHandle();
 
+  // Create and returns a copy of the SharedMemoryHandle passed.
+  static SharedMemoryHandle DuplicateHandle(const SharedMemoryHandle& handle);
+
   // Closes a shared memory handle.
   static void CloseHandle(const SharedMemoryHandle& handle);