Uninitialized variable in perftests causing issues on android bots.

cc/trees/layer_tree_host_common_perftest.cc

 // Copyright 2013 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_common.h"
 
 #include <sstream>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 145 matching lines @@
         can_render_to_separate_surface,
         host_impl->settings().layer_transforms_should_scale_layer_contents,
         host_impl->settings().verify_property_trees,
         &update_list, 0);
     LayerTreeHostCommon::CalculateDrawProperties(&inputs);
   }
 };
 
 class BspTreePerfTest : public CalcDrawPropsImplTest {
  public:
+  BspTreePerfTest() : num_duplicates_(1) {}
   void RunSortLayers() { RunTest(false, false, false); }
 
   void SetNumberOfDuplicates(int num_duplicates) {
     num_duplicates_ = num_duplicates;
   }
 
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 
   void DrawLayersOnThread(LayerTreeHostImpl* host_impl) override {
     LayerTreeImpl* active_tree = host_impl->active_tree();
@@ skipping 144 matching lines @@
 
 TEST_F(BspTreePerfTest, BspTreeCubes_4) {
   SetTestName("bsp_tree_cubes_4");
   SetNumberOfDuplicates(4);
   ReadTestFile("layer_sort_cubes");
   RunSortLayers();
 }
 
 }  // namespace
 }  // namespace cc