Add missing (and remove superfluous) 'explicit' from constructors.

content/renderer/render_view_impl.h

 // Copyright (c) 2012 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 CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 788 matching lines @@
       const string16& text, const ui::Range& replacement_range) OVERRIDE;
   virtual void SetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
   virtual ui::TextInputType GetTextInputType() OVERRIDE;
   virtual void GetSelectionBounds(gfx::Rect* start, gfx::Rect* end) OVERRIDE;
   virtual void GetCompositionCharacterBounds(
       std::vector<gfx::Rect>* character_bounds) OVERRIDE;
   virtual bool CanComposeInline() OVERRIDE;
   virtual bool WebWidgetHandlesCompositorScheduling() const OVERRIDE;
 
  protected:
-  RenderViewImpl(RenderViewImplParams* params);
+  explicit RenderViewImpl(RenderViewImplParams* params);
 
   // Do not delete directly.  This class is reference counted.
   virtual ~RenderViewImpl();
 
  private:
   // For unit tests.
   friend class ExternalPopupMenuTest;
   friend class PepperDeviceTest;
   friend class RendererAccessibilityTest;
   friend class WebIntentsHostTest;
@@ skipping 767 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_