cc: Allow the main thread to cancel commits

cc/trees/layer_tree_host_unittest_context.cc

 // Copyright 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 "cc/trees/layer_tree_host.h"
 
 #include "base/basictypes.h"
 #include "cc/layers/content_layer.h"
 #include "cc/layers/heads_up_display_layer.h"
 #include "cc/layers/io_surface_layer.h"
@@ skipping 268 matching lines @@
     recovered_context_ = false;
     if (NextTestCase())
       InvalidateAndSetNeedsCommit();
     else
       EndTest();
   }
 
   virtual void InvalidateAndSetNeedsCommit() {
     // Cause damage so we try to draw.
     layer_tree_host()->root_layer()->SetNeedsDisplay();
+    layer_tree_host()->SetNeedsCommit();
   }
 
   bool NextTestCase() {
     static const TestCase kTests[] = {
       // Losing the context and failing to recreate it (or losing it again
       // immediately) a small number of times should succeed.
       { 1,  // times_to_lose_during_commit
         0,  // times_to_lose_during_draw
         3,  // times_to_fail_reinitialize
         0,  // times_to_fail_recreate
@@ skipping 1298 matching lines @@
         impl_thread ? impl_thread->message_loop_proxy() : NULL);
     EXPECT_FALSE(layer_tree_host);
   }
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostTestCannotCreateIfCannotCreateOutputSurface);
 
 }  // namespace
 }  // namespace cc