Convert remaining scoped_ptr -> std::unique_ptr in //mojo/edk (minus js).

mojo/edk/embedder/platform_handle_vector.h

Index: mojo/edk/embedder/platform_handle_vector.h
diff --git a/mojo/edk/embedder/platform_handle_vector.h b/mojo/edk/embedder/platform_handle_vector.h
index 771df4fb9d470aa7dcff2f33530bc219dace6d7e..f61eb66452db2e5c4f14cfd99d6419d5f67c85ac 100644
--- a/mojo/edk/embedder/platform_handle_vector.h
+++ b/mojo/edk/embedder/platform_handle_vector.h
@@ -5,9 +5,9 @@
 #ifndef MOJO_EDK_EMBEDDER_PLATFORM_HANDLE_VECTOR_H_
 #define MOJO_EDK_EMBEDDER_PLATFORM_HANDLE_VECTOR_H_
 
+#include <memory>
 #include <vector>
 
-#include "base/memory/scoped_ptr.h"
 #include "mojo/edk/embedder/platform_handle.h"
 #include "mojo/edk/embedder/platform_handle_utils.h"
 #include "mojo/edk/system/system_impl_export.h"
@@ -15,9 +15,10 @@
 namespace mojo {
 namespace embedder {
 
+// TODO(vtl): Can we switch to using std::vector<ScopedPlatformHandle> instead?
 using PlatformHandleVector = std::vector<PlatformHandle>;
 
-// A deleter (for use with |scoped_ptr|) which closes all handles and then
+// A deleter (for use with |std::unique_ptr|) that closes all handles and then
 // |delete|s the |PlatformHandleVector|.
 struct MOJO_SYSTEM_IMPL_EXPORT PlatformHandleVectorDeleter {
   void operator()(PlatformHandleVector* platform_handles) const {
@@ -27,7 +28,7 @@ struct MOJO_SYSTEM_IMPL_EXPORT PlatformHandleVectorDeleter {
 };
 
 using ScopedPlatformHandleVectorPtr =
-    scoped_ptr<PlatformHandleVector, PlatformHandleVectorDeleter>;
+    std::unique_ptr<PlatformHandleVector, PlatformHandleVectorDeleter>;
 
 }  // namespace embedder
 }  // namespace mojo