Mojo: Add WebThemeEngine implementation.

mojo/examples/html_viewer/webthemeengine_impl.cc

 // Copyright 2014 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 "content/child/webthemeengine_impl_default.h"
+#include "mojo/examples/html_viewer/webthemeengine_impl.h"
 
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "ui/native_theme/native_theme.h"
 
 using blink::WebCanvas;
 using blink::WebColor;
 using blink::WebRect;
 using blink::WebThemeEngine;
 
-namespace content {
+namespace mojo {
+namespace examples {
 
 static ui::NativeTheme::Part NativeThemePart(
     WebThemeEngine::Part part) {
   switch (part) {
     case WebThemeEngine::PartScrollbarDownArrow:
       return ui::NativeTheme::kScrollbarDownArrow;
     case WebThemeEngine::PartScrollbarLeftArrow:
       return ui::NativeTheme::kScrollbarLeftArrow;
     case WebThemeEngine::PartScrollbarRightArrow:
       return ui::NativeTheme::kScrollbarRightArrow;
@@ skipping 164 matching lines @@
                                               const blink::WebRect& rect) {
   ui::NativeTheme::instance()->PaintStateTransition(
       canvas,
       NativeThemePart(part),
       NativeThemeState(startState),
       NativeThemeState(endState),
       progress,
       gfx::Rect(rect));
 }
 
-}  // namespace content
+}  // namespace examples
+}  // namespace mojo