Alternative to overlays on X windows.

Created a new GTK widget that gives us more control over when X windows (associated with GL contexts) are created and destroyed. This achieves the same thing as the overlay code (now reverted). It fixes two regressions with the overlay code:
- maps.google.com and html5test.com now work (switching between software and hardware rendering)
- expose events now get through in accelerated mode

BUG=58862,59887
TEST=Go to html5test.com. Should switch contents to show results. Disable compositing window manager. Go to http://peter.sh/2010/06/chromium-now-features-gpu-acceleration-and-css-3d-transforms/. Adjust the rotate z slider to enable accelerated compositing. Drag a different window over top. Redraws should happen.

Review URL: http://codereview.chromium.org/3973009
Patch from Jonathan Backer <backer@chromium.org>.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@64291 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 3 deletions

diff --git a/chrome/browser/gpu_process_host.cc b/chrome/browser/gpu_process_host.cc
index a33ef5c..be62820 100644
--- a/chrome/browser/gpu_process_host.cc
+++ b/chrome/browser/gpu_process_host.cc
@@ -23,6 +23,7 @@
 #include "media/base/media_switches.h"
 
 #if defined(OS_LINUX)
+#include "app/x11_util.h"
 #include "gfx/gtk_native_view_id_manager.h"
 #endif
 
@@ -237,7 +238,7 @@ void SendDelayedReply(IPC::Message* reply_msg) {
 }
 
 void GetViewXIDDispatcher(gfx::NativeViewId id, IPC::Message* reply_msg) {
-  unsigned long xid;
+  XID xid;
 
   GtkNativeViewManager* manager = Singleton<GtkNativeViewManager>::get();
   if (!manager->GetPermanentXIDForId(&xid, id)) {
@@ -253,11 +254,11 @@ void GetViewXIDDispatcher(gfx::NativeViewId id, IPC::Message* reply_msg) {
       NewRunnableFunction(&SendDelayedReply, reply_msg));
 }
 
-}
+} // namespace
 
 void GpuProcessHost::OnGetViewXID(gfx::NativeViewId id,
                                   IPC::Message *reply_msg) {
-  // Have to request a permanent overlay from UI thread.
+  // Have to request a permanent XID from UI thread.
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       NewRunnableFunction(&GetViewXIDDispatcher, id, reply_msg));