Moving GraphicsContext and dependencies from core to platform.

Source/platform/mac/LocalCurrentGraphicsContext.h

Index: Source/platform/mac/LocalCurrentGraphicsContext.h
diff --git a/Source/core/platform/mac/LocalCurrentGraphicsContext.h b/Source/platform/mac/LocalCurrentGraphicsContext.h
similarity index 92%
rename from Source/core/platform/mac/LocalCurrentGraphicsContext.h
rename to Source/platform/mac/LocalCurrentGraphicsContext.h
index 72780e38cfff0e52792df626319da7692c960fcb..95e5b46b7972d431fe8e53015e558adadf7b3bdf 100644
--- a/Source/core/platform/mac/LocalCurrentGraphicsContext.h
+++ b/Source/platform/mac/LocalCurrentGraphicsContext.h
@@ -17,7 +17,7 @@
  * Boston, MA 02110-1301, USA.
  */
 
-#include "core/platform/graphics/GraphicsContext.h"
+#include "platform/graphics/GraphicsContext.h"
 #include "wtf/Noncopyable.h"
 
 #include "skia/ext/skia_utils_mac.h"
@@ -28,7 +28,7 @@ namespace WebCore {
 
 // This class automatically saves and restores the current NSGraphicsContext for
 // functions which call out into AppKit and rely on the currentContext being set
-class LocalCurrentGraphicsContext {
+class PLATFORM_EXPORT LocalCurrentGraphicsContext {
     WTF_MAKE_NONCOPYABLE(LocalCurrentGraphicsContext);
 public:
     LocalCurrentGraphicsContext(GraphicsContext* graphicsContext);
@@ -41,7 +41,7 @@ private:
     gfx::SkiaBitLocker m_skiaBitLocker;
 };
 
-class ContextContainer {
+class PLATFORM_EXPORT ContextContainer {
     WTF_MAKE_NONCOPYABLE(ContextContainer);
 public:
     ContextContainer(GraphicsContext*);