Create an API around UtilityProcessHost and use that from chrome.

chrome/browser/image_decoder.h

Index: chrome/browser/image_decoder.h
===================================================================
--- chrome/browser/image_decoder.h	(revision 120256)
+++ chrome/browser/image_decoder.h	(working copy)
@@ -10,12 +10,13 @@
 #include <vector>
 
 #include "base/compiler_specific.h"
-#include "content/browser/utility_process_host.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/utility_process_host_client.h"
 
 class SkBitmap;
 
 // Decodes an image in a sandboxed process.
-class ImageDecoder : public UtilityProcessHost::Client {
+class ImageDecoder : public content::UtilityProcessHostClient {
  public:
   class Delegate {
    public:
@@ -43,7 +44,7 @@
   // It's a reference counted object, so destructor is private.
   virtual ~ImageDecoder();
 
-  // Overidden from UtilityProcessHost::Client:
+  // Overidden from UtilityProcessHostClient:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // IPC message handlers.