EDK: Move ref counting classes to mojo/edk/util.

mojo/edk/system/shared_buffer_dispatcher.h

Index: mojo/edk/system/shared_buffer_dispatcher.h
diff --git a/mojo/edk/system/shared_buffer_dispatcher.h b/mojo/edk/system/shared_buffer_dispatcher.h
index c61bd5cff545ffec68386eb048d7779fc180152c..853c91b38b8fa6cfbc4c2556af42af8178c50df0 100644
--- a/mojo/edk/system/shared_buffer_dispatcher.h
+++ b/mojo/edk/system/shared_buffer_dispatcher.h
@@ -7,8 +7,8 @@
 
 #include "mojo/edk/embedder/platform_shared_buffer.h"
 #include "mojo/edk/system/memory.h"
-#include "mojo/edk/system/ref_ptr.h"
 #include "mojo/edk/system/simple_dispatcher.h"
+#include "mojo/edk/util/ref_ptr.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
@@ -41,7 +41,7 @@ class SharedBufferDispatcher final : public SimpleDispatcher {
   // Static factory method: |validated_options| must be validated (obviously).
   // Returns null on error; |*result| will be set to an appropriate result
   // code).
-  static RefPtr<SharedBufferDispatcher> Create(
+  static util::RefPtr<SharedBufferDispatcher> Create(
       embedder::PlatformSupport* platform_support,
       const MojoCreateSharedBufferOptions& validated_options,
       uint64_t num_bytes,
@@ -52,14 +52,14 @@ class SharedBufferDispatcher final : public SimpleDispatcher {
 
   // The "opposite" of |SerializeAndClose()|. (Typically this is called by
   // |Dispatcher::Deserialize()|.)
-  static RefPtr<SharedBufferDispatcher> Deserialize(
+  static util::RefPtr<SharedBufferDispatcher> Deserialize(
       Channel* channel,
       const void* source,
       size_t size,
       embedder::PlatformHandleVector* platform_handles);
 
  private:
-  static RefPtr<SharedBufferDispatcher> CreateInternal(
+  static util::RefPtr<SharedBufferDispatcher> CreateInternal(
       scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer) {
     return AdoptRef(new SharedBufferDispatcher(shared_buffer.Pass()));
   }
@@ -79,10 +79,11 @@ class SharedBufferDispatcher final : public SimpleDispatcher {
 
   // |Dispatcher| protected methods:
   void CloseImplNoLock() override;
-  RefPtr<Dispatcher> CreateEquivalentDispatcherAndCloseImplNoLock() override;
+  util::RefPtr<Dispatcher> CreateEquivalentDispatcherAndCloseImplNoLock()
+      override;
   MojoResult DuplicateBufferHandleImplNoLock(
       UserPointer<const MojoDuplicateBufferHandleOptions> options,
-      RefPtr<Dispatcher>* new_dispatcher) override;
+      util::RefPtr<Dispatcher>* new_dispatcher) override;
   MojoResult MapBufferImplNoLock(
       uint64_t offset,
       uint64_t num_bytes,