Remove explicit keyword from multi-argument constructors

chrome/browser/printing/print_dialog_cloud_unittest.cc

Index: chrome/browser/printing/print_dialog_cloud_unittest.cc
diff --git a/chrome/browser/printing/print_dialog_cloud_unittest.cc b/chrome/browser/printing/print_dialog_cloud_unittest.cc
index 86a832ce4611ab28a7bf4d2fd9a1d221d486fd87..78f81d03e7b93fbebf7d76fb69f88250d5f8d5c6 100644
--- a/chrome/browser/printing/print_dialog_cloud_unittest.cc
+++ b/chrome/browser/printing/print_dialog_cloud_unittest.cc
@@ -81,9 +81,9 @@ class MockCloudPrintFlowHandler
     : public CloudPrintFlowHandler,
       public base::SupportsWeakPtr<MockCloudPrintFlowHandler> {
  public:
-  explicit MockCloudPrintFlowHandler(const FilePath& path,
-                                     const string16& title,
-                                     const std::string& file_type)
+  MockCloudPrintFlowHandler(const FilePath& path,
+                            const string16& title,
+                            const std::string& file_type)
       : CloudPrintFlowHandler(path, title, file_type) {}
   MOCK_METHOD0(DestructorCalled, void());
   MOCK_METHOD0(RegisterMessages, void());