GPU: Only restore one texture unit in ScopedTextureBinder.

ui/gl/scoped_binders.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/scoped_binders.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_state_restorer.h"
 
 namespace gfx {
@@ skipping 41 matching lines @@
     }
     glGetIntegerv(target_getter, &old_id_);
   }
   glBindTexture(target_, id);
 }
 
 ScopedTextureBinder::~ScopedTextureBinder() {
   if (state_restorer_) {
     DCHECK(!!GLContext::GetCurrent());
     DCHECK_EQ(state_restorer_, GLContext::GetCurrent()->GetGLStateRestorer());
-    state_restorer_->RestoreAllTextureUnitBindings();
+    state_restorer_->RestoreActiveTextureUnitBinding(target_);
   } else {
     glBindTexture(target_, old_id_);
   }
 }
 
 }  // namespace gfx