Move PlatformScreen, PlatformScreenChromium, and Widget to Source/platform

Source/platform/PlatformScreen.h

Index: Source/platform/PlatformScreen.h
diff --git a/Source/core/platform/PlatformScreen.h b/Source/platform/PlatformScreen.h
similarity index 83%
rename from Source/core/platform/PlatformScreen.h
rename to Source/platform/PlatformScreen.h
index f4866c59d405bd38b4cbf913f5abb9e87138935a..9dc083a215ca939b0a1a17cfe41c77f6378ddf9c 100644
--- a/Source/core/platform/PlatformScreen.h
+++ b/Source/platform/PlatformScreen.h
@@ -36,16 +36,17 @@ typedef WTF::Vector<char> ColorProfile;
 
 namespace WebCore {
 
-    class FloatRect;
-    class Widget;
+class FloatRect;
+class Widget;
 
-    int screenDepth(Widget*);
-    int screenDepthPerComponent(Widget*);
-    bool screenIsMonochrome(Widget*);
+PLATFORM_EXPORT int screenDepth(Widget*);
+PLATFORM_EXPORT int screenDepthPerComponent(Widget*);
+PLATFORM_EXPORT bool screenIsMonochrome(Widget*);
+
+PLATFORM_EXPORT FloatRect screenRect(Widget*);
+PLATFORM_EXPORT FloatRect screenAvailableRect(Widget*);
+PLATFORM_EXPORT void screenColorProfile(ColorProfile&);
 
-    FloatRect screenRect(Widget*);
-    FloatRect screenAvailableRect(Widget*);
-    void screenColorProfile(ColorProfile&);
 } // namespace WebCore
 
 #endif // PlatformScreen_h