Introduce ui.dll / libui.so for the component build.

ui/gfx/blit.h

 // Copyright (c) 2011 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 UI_GFX_BLIT_H_
 #define UI_GFX_BLIT_H_
 #pragma once
 
 #include "ui/gfx/native_widget_types.h"
+#include "ui/ui_api.h"
 
 class SkCanvas;
 
 namespace gfx {
 
 class Point;
 class Rect;
 
 // Blits a rectangle from the source context into the destination context.
-void BlitContextToContext(NativeDrawingContext dst_context,
-                          const Rect& dst_rect,
-                          NativeDrawingContext src_context,
-                          const Point& src_origin);
+UI_API void BlitContextToContext(NativeDrawingContext dst_context,
+                                 const Rect& dst_rect,
+                                 NativeDrawingContext src_context,
+                                 const Point& src_origin);
 
 // Blits a rectangle from the source context into the destination canvas.
-void BlitContextToCanvas(SkCanvas *dst_canvas,
-                         const Rect& dst_rect,
-                         NativeDrawingContext src_context,
-                         const Point& src_origin);
+UI_API void BlitContextToCanvas(SkCanvas *dst_canvas,
+                                const Rect& dst_rect,
+                                NativeDrawingContext src_context,
+                                const Point& src_origin);
 
 // Blits a rectangle from the source canvas into the destination context.
-void BlitCanvasToContext(NativeDrawingContext dst_context,
-                         const Rect& dst_rect,
-                         SkCanvas *src_canvas,
-                         const Point& src_origin);
+UI_API void BlitCanvasToContext(NativeDrawingContext dst_context,
+                                const Rect& dst_rect,
+                                SkCanvas *src_canvas,
+                                const Point& src_origin);
 
 // Blits a rectangle from the source canvas into the destination canvas.
-void BlitCanvasToCanvas(SkCanvas *dst_canvas,
-                        const Rect& dst_rect,
-                        SkCanvas *src_canvas,
-                        const Point& src_origin);
+UI_API void BlitCanvasToCanvas(SkCanvas *dst_canvas,
+                               const Rect& dst_rect,
+                               SkCanvas *src_canvas,
+                               const Point& src_origin);
 
 // Scrolls the given subset of the given canvas by the given amount.
 // The canvas should not have a clip or a transform applied, since platforms
 // may implement those operations differently.
-void ScrollCanvas(SkCanvas* canvas,
-                  const Rect& clip,
-                  const Point& amount);
+UI_API void ScrollCanvas(SkCanvas* canvas,
+                         const Rect& clip,
+                         const Point& amount);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_BLIT_H_