base: Remove the string logging from CHECK().

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 <stddef.h>
 
 #include <deque>
 #include <memory>
 #include <sstream>
 
@@ skipping 41 matching lines @@
     scoped_refptr<Layer> root =
         ParseTreeFromJson(json_, &content_layer_client_);
     ASSERT_TRUE(root.get());
     layer_tree()->SetRootLayer(root);
     content_layer_client_.set_bounds(viewport);
   }
 
   void SetTestName(const std::string& name) { test_name_ = name; }
 
   void AfterTest() override {
-    CHECK(!test_name_.empty()) << "Must SetTestName() before TearDown().";
+    // Must SetTestName() before TearDown().
+    CHECK(!test_name_.empty());
     perf_test::PrintResult("calc_draw_props_time",
                            "",
                            test_name_,
                            1000 * timer_.MsPerLap(),
                            "us",
                            true);
   }
 
  protected:
   FakeContentLayerClient content_layer_client_;
@@ skipping 68 matching lines @@
 }
 
 TEST_F(CalcDrawPropsTest, TouchRegionHeavy) {
   SetTestName("touch_region_heavy");
   ReadTestFile("touch_region_heavy");
   RunCalcDrawProps();
 }
 
 }  // namespace
 }  // namespace cc