Replace ASSERT and ASSERT_NOT_REACHED in third_party/Webkit/public

third_party/WebKit/public/platform/WebPrivatePtr.h

Index: third_party/WebKit/public/platform/WebPrivatePtr.h
diff --git a/third_party/WebKit/public/platform/WebPrivatePtr.h b/third_party/WebKit/public/platform/WebPrivatePtr.h
index 6de994ec24fee715831ae951255919f3828cd5b9..1349d00c82d7d4890d4d3a0a6c859a35c6a22598 100644
--- a/third_party/WebKit/public/platform/WebPrivatePtr.h
+++ b/third_party/WebKit/public/platform/WebPrivatePtr.h
@@ -305,12 +305,12 @@ class WebPrivatePtr {
   T* Get() const { return Storage().Get(); }
 
   T& operator*() const {
-    ASSERT(storage_);
+    DCHECK(storage_);
     return *Get();
   }
 
   T* operator->() const {
-    ASSERT(storage_);
+    DCHECK(storage_);
     return Get();
   }
 #endif