Fix gl context change on dropping a texture

ui/gfx/compositor/compositor_gl.h

Index: ui/gfx/compositor/compositor_gl.h
diff --git a/ui/gfx/compositor/compositor_gl.h b/ui/gfx/compositor/compositor_gl.h
index cc59c6872d3dd46f72cb4e7c6df18588b2472543..3200f8a0d76ecc4983bd1a0069f782a2273ab723 100644
--- a/ui/gfx/compositor/compositor_gl.h
+++ b/ui/gfx/compositor/compositor_gl.h
@@ -11,6 +11,7 @@
 #include "base/memory/singleton.h"
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/compositor/compositor.h"
+#include "ui/gfx/gl/scoped_make_current.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
@@ -32,6 +33,10 @@ class COMPOSITOR_EXPORT SharedResourcesGL : public SharedResources {
 
   virtual bool MakeSharedContextCurrent();

[jonathan.backer, 2011/11/02 23:09:34]

I think that we can deprecate this in favour of the new method below. Maybe file
a bug and address as a separate CL.

 
+  // Creates an instance of ScopedMakeCurrent.
+  // Note: Caller is responsible for managing lifetime of returned pointer.
+  gfx::ScopedMakeCurrent* GetScopedMakeCurrent();
+
   // Creates a context that shares the resources hosted by this singleton.
   scoped_refptr<gfx::GLContext> CreateContext(gfx::GLSurface* surface);