cc: Put context-loss tests in layer_tree_host_unittest_context.cc

cc/test/fake_content_layer_impl.h

Index: cc/test/fake_content_layer_impl.h
diff --git a/cc/test/fake_content_layer_impl.h b/cc/test/fake_content_layer_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..0d797a662c3957235f8d096599dae174dffcfcd8
--- /dev/null
+++ b/cc/test/fake_content_layer_impl.h
@@ -0,0 +1,38 @@
+// 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.
+
+#ifndef CC_TEST_FAKE_CONTENT_LAYER_IMPL_H_
+#define CC_TEST_FAKE_CONTENT_LAYER_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/tiled_layer_impl.h"
+
+namespace cc {
+
+class FakeContentLayerImpl : public TiledLayerImpl {
+ public:
+  static scoped_ptr<FakeContentLayerImpl> Create(
+      LayerTreeImpl* tree_impl, int id) {
+    return make_scoped_ptr(new FakeContentLayerImpl(tree_impl, id));
+  }
+  virtual ~FakeContentLayerImpl();
+
+  bool HaveResourceForTileAt(int i, int j);
+
+  size_t lost_output_surface_count() const {
+    return lost_output_surface_count_;
+  }
+  void reset_lost_output_surface_count() { lost_output_surface_count_ = 0; }
+
+  virtual void didLoseOutputSurface() OVERRIDE;
+
+ private:
+  explicit FakeContentLayerImpl(LayerTreeImpl* tree_impl, int id);
+
+  size_t lost_output_surface_count_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_FAKE_CONTENT_LAYER_IMPL_H_