Moving GraphicsContext and dependencies from core to platform.

Source/platform/graphics/GraphicsContext.h

Index: Source/platform/graphics/GraphicsContext.h
diff --git a/Source/core/platform/graphics/GraphicsContext.h b/Source/platform/graphics/GraphicsContext.h
similarity index 98%
rename from Source/core/platform/graphics/GraphicsContext.h
rename to Source/platform/graphics/GraphicsContext.h
index ea4b991155bf5aa671d6f894f0edbf0a67c79f09..81c93850e3164f1fa7cc13ed8cc841f593863293 100644
--- a/Source/core/platform/graphics/GraphicsContext.h
+++ b/Source/platform/graphics/GraphicsContext.h
@@ -28,17 +28,18 @@
 #ifndef GraphicsContext_h
 #define GraphicsContext_h
 
-#include "core/platform/graphics/Font.h"
-#include "core/platform/graphics/GraphicsContextAnnotation.h"
-#include "core/platform/graphics/GraphicsContextState.h"
-#include "core/platform/graphics/ImageBuffer.h"
-#include "core/platform/graphics/skia/OpaqueRegionSkia.h"
-#include "core/platform/graphics/skia/SkiaUtils.h"
+#include "platform/PlatformExport.h"
 #include "platform/TraceEvent.h"
+#include "platform/fonts/Font.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/DashArray.h"
 #include "platform/graphics/DrawLooper.h"
+#include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/ImageOrientation.h"
+#include "platform/graphics/GraphicsContextAnnotation.h"
+#include "platform/graphics/GraphicsContextState.h"
+#include "platform/graphics/skia/OpaqueRegionSkia.h"
+#include "platform/graphics/skia/SkiaUtils.h"
 // TODO(robertphillips): replace this include with "class SkBaseDevice;"
 #include "third_party/skia/include/core/SkDevice.h"
 #include "wtf/FastAllocBase.h"
@@ -58,7 +59,7 @@ class DisplayList;
 class ImageBuffer;
 class KURL;
 
-class GraphicsContext {
+class PLATFORM_EXPORT GraphicsContext {
     WTF_MAKE_NONCOPYABLE(GraphicsContext); WTF_MAKE_FAST_ALLOCATED;
 public:
     enum AntiAliasingMode {
@@ -371,7 +372,7 @@ public:
 
     static void adjustLineToPixelBoundaries(FloatPoint& p1, FloatPoint& p2, float strokeWidth, StrokeStyle);
 
-    void beginAnnotation(const GraphicsContextAnnotation&);
+    void beginAnnotation(const char*, const char*, const String&, const String&, const String&);
     void endAnnotation();
 
 private: