reland 31875. Revert was:...

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
===================================================================
--- chrome/common/render_messages.h	(revision 32085)
+++ chrome/common/render_messages.h	(working copy)
@@ -12,6 +12,7 @@
 #include "app/clipboard/clipboard.h"
 #include "app/gfx/native_widget_types.h"
 #include "base/basictypes.h"
+#include "base/platform_file.h"
 #include "base/ref_counted.h"
 #include "base/shared_memory.h"
 #include "base/string16.h"
@@ -31,6 +32,7 @@
 #include "chrome/common/webkit_param_traits.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_utils.h"
+#include "ipc/ipc_platform_file.h"
 #include "media/audio/audio_output.h"
 #include "net/base/upload_data.h"
 #include "net/http/http_response_headers.h"
@@ -50,12 +52,7 @@
 #include "webkit/glue/webplugininfo.h"
 #include "webkit/glue/webpreferences.h"
 
-#if defined(OS_WIN)
-#include "base/platform_file.h"
-#endif
-
 #if defined(OS_POSIX)
-#include "base/file_descriptor_posix.h"
 #endif
 
 namespace base {
@@ -410,10 +407,8 @@
 };
 
 struct ViewMsg_DatabaseOpenFileResponse_Params {
-#if defined(OS_WIN)
-  base::PlatformFile file_handle;     // DB file handle
-#elif defined(OS_POSIX)
-  base::FileDescriptor file_handle;   // DB file handle
+  IPC::PlatformFileForTransit file_handle;     // DB file handle
+#if defined(OS_POSIX)
   base::FileDescriptor dir_handle;    // DB directory handle
 #endif
 };
@@ -421,11 +416,7 @@
 struct ViewMsg_OpenFileForPluginResponse_Params {
   // Note: if we end up having to add a directory handle, this should be
   // combined with the DatabaseOpenFileResponse_Params struct.
-#if defined(OS_WIN)
-  base::PlatformFile file_handle;
-#elif defined(OS_POSIX)
-  base::FileDescriptor file_handle;
-#endif
+  IPC::PlatformFileForTransit file_handle;
 };
 
 // Parameters to describe a rendered page.