Replace ASSERT and ASSERT_NOT_REACHED in core/style/

third_party/WebKit/Source/core/style/DataPersistent.h

 // Copyright 2016 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 DataPersistent_h
 #define DataPersistent_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
 #include "wtf/PtrUtil.h"
@@ skipping 38 matching lines @@
 
   T* access() {
     if (m_data && !m_ownCopy) {
       *m_data = (*m_data)->copy();
       m_ownCopy = true;
     }
     return m_data ? m_data->get() : nullptr;
   }
 
   void init() {
-    ASSERT(!m_data);
+    DCHECK(!m_data);
     m_data = WTF::wrapUnique(new Persistent<T>(T::create()));
     m_ownCopy = true;
   }
 
   bool operator==(const DataPersistent<T>& o) const {
-    ASSERT(m_data);
-    ASSERT(o.m_data);
+    DCHECK(m_data);
+    DCHECK(o.m_data);
     return m_data->get() == o.m_data->get() ||
            *m_data->get() == *o.m_data->get();
   }
 
   bool operator!=(const DataPersistent<T>& o) const {
-    ASSERT(m_data);
-    ASSERT(o.m_data);
+    DCHECK(m_data);
+    DCHECK(o.m_data);
     return m_data->get() != o.m_data->get() &&
            *m_data->get() != *o.m_data->get();
   }
 
   void operator=(std::nullptr_t) { m_data.clear(); }
 
  private:
   // Reduce size of DataPersistent<> by delaying creation of Persistent<>.
   std::unique_ptr<Persistent<T>> m_data;
   unsigned m_ownCopy : 1;
 };
 
 }  // namespace blink
 
 #endif  // DataPersistent_h