Remove BLINK_ASSERT() and BLINK_ASSERT_NOT_REACHED() macros.

content/test/mock_webblob_registry_impl.cc

Index: content/test/mock_webblob_registry_impl.cc
diff --git a/content/test/mock_webblob_registry_impl.cc b/content/test/mock_webblob_registry_impl.cc
index 13dbac5e2aa7ba17c44881d21b58a30a1e071ea8..352d4e304d69779f3aa55023f243d70adbb8855d 100644
--- a/content/test/mock_webblob_registry_impl.cc
+++ b/content/test/mock_webblob_registry_impl.cc
@@ -24,6 +24,13 @@ void MockWebBlobRegistryImpl::registerBlobData(const WebString& uuid,
                                                const WebBlobData& data) {
 }
 
+MockWebBlobRegistryImpl::Builder* MockWebBlobRegistryImpl::createBuilder(
+    const blink::WebString& uuid,
+    const blink::WebString& contentType) {
+  NOTREACHED();
+  return nullptr;
+}
+
 void MockWebBlobRegistryImpl::addBlobDataRef(const WebString& uuid) {
 }