Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/base/scopedptrcollection_unittest.cc

Index: webrtc/base/scopedptrcollection_unittest.cc
diff --git a/webrtc/base/scopedptrcollection_unittest.cc b/webrtc/base/scopedptrcollection_unittest.cc
index 933173e3fafabc29718d7d6cc0fe1fadf3be25a2..267b110aae404a4c56791b709ebcb0d36b75ef22 100644
--- a/webrtc/base/scopedptrcollection_unittest.cc
+++ b/webrtc/base/scopedptrcollection_unittest.cc
@@ -8,6 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include <memory>
+
 #include "webrtc/base/scopedptrcollection.h"
 #include "webrtc/base/gunit.h"
 
@@ -41,7 +43,7 @@ class ScopedPtrCollectionTest : public testing::Test {
   }
 
   int num_instances_;
-  scoped_ptr<ScopedPtrCollection<InstanceCounter> > collection_;
+  std::unique_ptr<ScopedPtrCollection<InstanceCounter> > collection_;
 };
 
 TEST_F(ScopedPtrCollectionTest, PushBack) {