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

content/renderer/gpu/compositor_software_output_device_gl_adapter.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_GPU_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_GL_ADAPTER_H_
 #define CONTENT_RENDERER_GPU_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_GL_ADAPTER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
 #include "cc/software_output_device.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebImage.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "ui/gfx/size.h"
 
 namespace content {
 
 // This class can be created only on the main thread, but then becomes pinned
 // to a fixed thread when bindToClient is called.
 class CompositorSoftwareOutputDeviceGLAdapter
     : NON_EXPORTED_BASE(public cc::SoftwareOutputDevice),
       NON_EXPORTED_BASE(public base::NonThreadSafe) {
 public:
-  CompositorSoftwareOutputDeviceGLAdapter(
+  explicit CompositorSoftwareOutputDeviceGLAdapter(
       WebKit::WebGraphicsContext3D* context3d);
   virtual ~CompositorSoftwareOutputDeviceGLAdapter();
 
   // cc::SoftwareOutputDevice implementation
   virtual WebKit::WebImage* Lock(bool forWrite) OVERRIDE;
   virtual void Unlock() OVERRIDE;
   virtual void DidChangeViewportSize(gfx::Size size) OVERRIDE;
 
 private:
   void Initialize();
@@ skipping 11 matching lines @@
 
   scoped_ptr<WebKit::WebGraphicsContext3D> context3d_;
   scoped_ptr<SkDevice> device_;
   WebKit::WebImage image_;
   bool locked_for_write_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_GL_ADAPTER_H_