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

cc/test/fake_output_surface.h

Index: cc/test/fake_output_surface.h
diff --git a/cc/test/fake_output_surface.h b/cc/test/fake_output_surface.h
index 70e79b161fa48816ce75e02a16d2c1bc5758ca12..69636fb061d086885b31a2e9cd762fcde1c84cea 100644
--- a/cc/test/fake_output_surface.h
+++ b/cc/test/fake_output_surface.h
@@ -66,10 +66,10 @@ class FakeOutputSurface : public OutputSurface {
   virtual void SendFrameToParentCompositor(const CompositorFrame&) OVERRIDE;
 
 private:
-  explicit FakeOutputSurface(
-      scoped_ptr<WebKit::WebGraphicsContext3D> context3d, bool has_parent);
-  explicit FakeOutputSurface(
-      scoped_ptr<SoftwareOutputDevice> software_device, bool has_parent);
+  FakeOutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D> context3d,
+                    bool has_parent);
+  FakeOutputSurface(scoped_ptr<SoftwareOutputDevice> software_device,
+                    bool has_parent);
 
   scoped_ptr<WebKit::WebGraphicsContext3D> context3d_;
   scoped_ptr<SoftwareOutputDevice> software_device_;