views: Mark single-argument constructors as explicit.

ui/views/widget/widget_unittest.cc

 // 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.
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/point.h"
@@ skipping 18 matching lines @@
 typedef NativeWidgetAura NativeWidgetPlatform;
 #elif defined(OS_WIN)
 typedef NativeWidgetWin NativeWidgetPlatform;
 #endif
 
 // A widget that assumes mouse capture always works. It won't on Aura in
 // testing, so we mock it.
 #if defined(USE_AURA)
 class NativeWidgetCapture : public NativeWidgetPlatform {
  public:
-  NativeWidgetCapture(internal::NativeWidgetDelegate* delegate)
+  explicit NativeWidgetCapture(internal::NativeWidgetDelegate* delegate)
       : NativeWidgetPlatform(delegate),
         mouse_capture_(false) {}
   virtual ~NativeWidgetCapture() {}
 
   virtual void SetCapture(unsigned int flags) OVERRIDE {
     if (!(flags & ui::CW_LOCK_MOUSE))
       return;
     mouse_capture_ = true;
   }
   virtual void ReleaseCapture() OVERRIDE {
@@ skipping 347 matching lines @@
 
  private:
   OwnershipTestState* state_;
 
   DISALLOW_COPY_AND_ASSIGN(OwnershipTestNativeWidgetPlatform);
 };
 
 // A Widget subclass that updates a bag of state when it is destroyed.
 class OwnershipTestWidget : public Widget {
  public:
-  OwnershipTestWidget(OwnershipTestState* state) : state_(state) {}
+  explicit OwnershipTestWidget(OwnershipTestState* state) : state_(state) {}
   virtual ~OwnershipTestWidget() {
     state_->widget_deleted = true;
   }
 
  private:
   OwnershipTestState* state_;
 
   DISALLOW_COPY_AND_ASSIGN(OwnershipTestWidget);
 };
 
@@ skipping 401 matching lines @@
   // And it stays maximized after getting out of full screen.
   EXPECT_EQ(ui::SHOW_STATE_MAXIMIZED, GetWidgetShowState(toplevel));
 
   // Clean up.
   toplevel->Close();
   RunPendingMessages();
 }
 
 }  // namespace
 }  // namespace views