Make SharedMemoryHandle a class on windows.

ui/surface/transport_dib_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/surface/transport_dib.h"
 
 #include <windows.h>
 
 #include <limits>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sys_info.h"
 #include "skia/ext/platform_canvas.h"
 
 TransportDIB::TransportDIB()
     : size_(0) {
 }
 
 TransportDIB::~TransportDIB() {
 }
 
-TransportDIB::TransportDIB(HANDLE handle)
-    : shared_memory_(handle, false /* read write */),
-      size_(0) {
-}
+TransportDIB::TransportDIB(base::SharedMemoryHandle handle)
+    : shared_memory_(handle, false /* read write */), size_(0) {}
 
 // static
 TransportDIB* TransportDIB::Create(size_t size, uint32 sequence_num) {
   TransportDIB* dib = new TransportDIB;
 
   if (!dib->shared_memory_.CreateAnonymous(size)) {
     delete dib;
     return NULL;
   }
 
@@ skipping 11 matching lines @@
   return dib.release();
 }
 
 // static
 TransportDIB* TransportDIB::CreateWithHandle(Handle handle) {
   return new TransportDIB(handle);
 }
 
 // static
 bool TransportDIB::is_valid_handle(Handle dib) {
-  return dib != NULL;
+  return dib.IsValid();
 }
 
 skia::PlatformCanvas* TransportDIB::GetPlatformCanvas(int w, int h) {
   // This DIB already mapped the file into this process, but PlatformCanvas
   // will map it again.
   DCHECK(!memory()) << "Mapped file twice in the same process.";
 
   // We can't check the canvas size before mapping, but it's safe because
   // Windows will fail to map the section if the dimensions of the canvas
   // are too large.
-  skia::PlatformCanvas* canvas =
-      skia::CreatePlatformCanvas(w, h, true, shared_memory_.handle(),
-                                 skia::RETURN_NULL_ON_FAILURE);
+  skia::PlatformCanvas* canvas = skia::CreatePlatformCanvas(
+      w, h, true, shared_memory_.handle().GetHandle(),
+      skia::RETURN_NULL_ON_FAILURE);
 
   // Calculate the size for the memory region backing the canvas.
   if (canvas)
     size_ = skia::PlatformCanvasStrideForWidth(w) * h;
 
   return canvas;
 }
 
 bool TransportDIB::Map() {
   if (!is_valid_handle(shared_memory_.handle()))
     return false;
   if (memory())
     return true;
 
   if (!shared_memory_.Map(0 /* map whole shared memory segment */)) {
     LOG(ERROR) << "Failed to map transport DIB"
-               << " handle:" << shared_memory_.handle()
+               << " handle:" << shared_memory_.handle().GetHandle()
                << " error:" << ::GetLastError();
     return false;
   }
 
   size_ = shared_memory_.mapped_size();
   return true;
 }
 
 void* TransportDIB::memory() const {
   return shared_memory_.memory();
 }