Remove cc:LayerTreeHostImpl::IsContextLost.

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 6956 matching lines @@
   LayerTreeHostImplCountingLostSurfaces() : num_lost_surfaces_(0) {}
   virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE {
     num_lost_surfaces_++;
   }
 
  protected:
   int num_lost_surfaces_;
 };
 
 TEST_F(LayerTreeHostImplCountingLostSurfaces, TwiceLostSurface) {
-  // The medium term, we plan to remove LayerTreeHostImpl::IsContextLost().
-  // Until then, we need the state variable
-  // LayerTreeHostImpl::have_valid_output_surface_ and we can
-  // enforce the following behaviour, where calling DidLoseOutputSurface
-  // twice in a row only causes one subsequent
-  // call to LayerTreeHostImplClient::DidLoseOutputSurfaceOnImplThread().
   // Really we just need at least one client notification each time
   // we go from having a valid output surface to not having a valid output
   // surface.
   EXPECT_EQ(0, num_lost_surfaces_);
-  EXPECT_FALSE(host_impl_->IsContextLost());
   host_impl_->DidLoseOutputSurface();
-  EXPECT_TRUE(host_impl_->IsContextLost());
   EXPECT_EQ(1, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
-  EXPECT_TRUE(host_impl_->IsContextLost());
-  EXPECT_EQ(1, num_lost_surfaces_);
+  EXPECT_LE(1, num_lost_surfaces_);
 }
 
 }  // namespace
 }  // namespace cc