Revert 61608 - On Windows, create a new TransportDIB::Handle struct which includes the file

mapping HANDLE and the source process ID. Duplicating the handle for the
remote process is done in TransportDIB::Map, instead of in various #ifdefs
scattered across the code. Also on windows, remove the struct for the
TransportDIB::Id which contained both the sequence number and the HANDLE
and replace it with just the sequence number.

Fix ThumbnailGenerator by mapping the TransportDIB on Windows and adding
a method to duplicate the file mapping handle before sending across the
channel.
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/3305020

BUG=58128
TBR=kkania@chromium.org
Review URL: http://codereview.chromium.org/3596008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@61624 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 6 deletions

diff --git a/chrome/common/render_messages_params.h b/chrome/common/render_messages_params.h
index 7181b1b..2b0c0d0 100644
--- a/chrome/common/render_messages_params.h
+++ b/chrome/common/render_messages_params.h
@@ -285,12 +285,9 @@ struct ViewHostMsg_UpdateRect_Params {
   ViewHostMsg_UpdateRect_Params();
   ~ViewHostMsg_UpdateRect_Params();
 
-  // The ID of the bitmap to be painted into the view at the locations specified
-  // by update_rects.
-  TransportDIB::Id dib_id;
-
-  // The handle to the bitmap, in case it needs to be mapped on the browser.
-  TransportDIB::Handle dib_handle;
+  // The bitmap to be painted into the view at the locations specified by
+  // update_rects.
+  TransportDIB::Id bitmap;
 
   // The position and size of the bitmap.
   gfx::Rect bitmap_rect;