Moving GraphicsContext and dependencies from core to platform.

Source/platform/fonts/GlyphPageTreeNode.h

Index: Source/platform/fonts/GlyphPageTreeNode.h
diff --git a/Source/core/platform/graphics/GlyphPageTreeNode.h b/Source/platform/fonts/GlyphPageTreeNode.h
similarity index 96%
rename from Source/core/platform/graphics/GlyphPageTreeNode.h
rename to Source/platform/fonts/GlyphPageTreeNode.h
index eec5ef2f6a8d9a201528f673fe57e12535cf81ca..2ac20a2ca2a9e216c4727e874b2653bfbf57f5c2 100644
--- a/Source/core/platform/graphics/GlyphPageTreeNode.h
+++ b/Source/platform/fonts/GlyphPageTreeNode.h
@@ -38,8 +38,8 @@
 #include "wtf/unicode/Unicode.h"
 
 #ifndef NDEBUG
-void showGlyphPageTrees();
-void showGlyphPageTree(unsigned pageNumber);
+void PLATFORM_EXPORT showGlyphPageTrees();
+void PLATFORM_EXPORT showGlyphPageTree(unsigned pageNumber);
 #endif
 
 namespace WebCore {
@@ -67,8 +67,8 @@ class SimpleFontData;
 // system fallback page is not populated at construction like the other pages,
 // but on demand for each glyph, because the system may need to use different
 // fallback fonts for each. This lazy population is done by the Font.
-class GlyphPageTreeNode {
-    WTF_MAKE_FAST_ALLOCATED;
+class PLATFORM_EXPORT GlyphPageTreeNode {
+    WTF_MAKE_FAST_ALLOCATED; WTF_MAKE_NONCOPYABLE(GlyphPageTreeNode);
 public:
     static GlyphPageTreeNode* getRootChild(const FontData* fontData, unsigned pageNumber)
     {