Remove explicit keyword from multi-argument constructors

ppapi/cpp/dev/font_dev.h

 // Copyright (c) 2010 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 PPAPI_CPP_DEV_FONT_DEV_H_
 #define PPAPI_CPP_DEV_FONT_DEV_H_
 
 #include <string>
 
 #include "ppapi/c/dev/ppb_font_dev.h"
@@ skipping 86 matching lines @@
 
 // Font ------------------------------------------------------------------------
 
 // Provides access to system fonts.
 class Font_Dev : public Resource {
  public:
   // Creates an is_null() Font object.
   Font_Dev();
 
   explicit Font_Dev(PP_Resource resource);
-  explicit Font_Dev(Instance* instance, const FontDescription_Dev& description);
+  Font_Dev(Instance* instance, const FontDescription_Dev& description);
   Font_Dev(const Font_Dev& other);
 
   Font_Dev& operator=(const Font_Dev& other);
 
   // PPB_Font methods:
   static Var GetFontFamilies(Instance* instance);
   bool Describe(FontDescription_Dev* description,
                 PP_FontMetrics_Dev* metrics) const;
   bool DrawTextAt(ImageData* dest,
                   const TextRun_Dev& text,
@@ skipping 14 matching lines @@
                       uint32_t color,
                       bool image_data_is_opaque = false) const;
 
   // Convenience function that assumes a left-to-right string.
   int32_t MeasureSimpleText(const std::string& text) const;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_FONT_DEV_H_