Moving GraphicsContext and dependencies from core to platform.

Source/web/WebFontCache.cpp

Index: Source/web/WebFontCache.cpp
diff --git a/Source/web/WebFontCache.cpp b/Source/web/WebFontCache.cpp
index 971316ba80a7fc68ceb2d891af3e90125a95b4c8..f17337c2574b23492eac328458418ad881baa394 100644
--- a/Source/web/WebFontCache.cpp
+++ b/Source/web/WebFontCache.cpp
@@ -31,7 +31,7 @@
 #include "config.h"
 #include "WebFontCache.h"
 
-#include "core/platform/graphics/FontCache.h"
+#include "platform/fonts/FontCache.h"
 
 using namespace WebCore;
 
@@ -40,7 +40,7 @@ namespace blink {
 // static
 void WebFontCache::clear()
 {
-    fontCache()->invalidate();
+    FontCache::fontCache()->invalidate();
 }
 
 }  // namespace blink