Refactor rtc_unittests into several targets.

webrtc/base/refcountedobject_unittest.cc

 /*
  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 12 matching lines @@
 
  private:
   RTC_DISALLOW_COPY_AND_ASSIGN(A);
 };
 
 class RefClass : public RefCountInterface {
  public:
   RefClass() {}
 
  protected:
-  virtual ~RefClass() {}
+  ~RefClass() override {}
 };
 
 class RefClassWithRvalue : public RefCountInterface {
  public:
   explicit RefClassWithRvalue(std::unique_ptr<A> a) : a_(std::move(a)) {}
 
  protected:
-  virtual ~RefClassWithRvalue() {}
+  ~RefClassWithRvalue() override {}
 
  public:
   std::unique_ptr<A> a_;
 };
 
 class RefClassWithMixedValues : public RefCountInterface {
  public:
   RefClassWithMixedValues(std::unique_ptr<A> a, int b, const std::string& c)
       : a_(std::move(a)), b_(b), c_(c) {}
 
  protected:
-  virtual ~RefClassWithMixedValues() {}
+  ~RefClassWithMixedValues() override {}
 
  public:
   std::unique_ptr<A> a_;
   int b_;
   std::string c_;
 };
 
 }  // namespace
 
 TEST(RefCountedObject, Basic) {
@@ skipping 18 matching lines @@
   std::string c = "hello";
   scoped_refptr<RefClassWithMixedValues> ref(
       new RefCountedObject<RefClassWithMixedValues>(std::move(a), b, c));
   EXPECT_TRUE(ref->a_.get() != nullptr);
   EXPECT_TRUE(a.get() == nullptr);
   EXPECT_EQ(b, ref->b_);
   EXPECT_EQ(c, ref->c_);
 }
 
 }  // namespace rtc