Introduce typeface cache in blink::FontCache

third_party/WebKit/Source/platform/fonts/FontRenderStyle.h

Index: third_party/WebKit/Source/platform/fonts/FontRenderStyle.h
diff --git a/third_party/WebKit/Source/platform/fonts/FontRenderStyle.h b/third_party/WebKit/Source/platform/fonts/FontRenderStyle.h
index f00af63ecbf9c2da7b56de9de16f7b525eddd1dd..7e70f6caf20b738a46eae5d41ca591492f500e96 100644
--- a/third_party/WebKit/Source/platform/fonts/FontRenderStyle.h
+++ b/third_party/WebKit/Source/platform/fonts/FontRenderStyle.h
@@ -32,11 +32,19 @@
 
 #include "wtf/Allocator.h"
 
+#include "platform/PlatformExport.h"
+#include "SkTypeface.h"
+#include "SkPaint.h"
+
+namespace WTF {
+class String;
+}
+
 namespace blink {
 
 // FontRenderStyle describes the user's preferences for rendering a font at a
 // given size.
-struct FontRenderStyle {
+struct PLATFORM_EXPORT FontRenderStyle {
     DISALLOW_NEW();
     enum {
         NoPreference = 2,
@@ -62,6 +70,15 @@ struct FontRenderStyle {
             && useSubpixelPositioning == a.useSubpixelPositioning;
     }
 
+    static void setHinting(SkPaint::Hinting);
+    static void setAutoHint(bool);
+    static void setUseBitmaps(bool);
+    static void setAntiAlias(bool);
+    static void setSubpixelRendering(bool);
+
+    void apply(SkPaint*, float deviceScaleFactor = 1.0) const;
+    void querySystemForRenderStyle(WTF::String family, float textSize, SkTypeface::Style);
+
     // Each of the use* members below can take one of three values:
     //   0: off
     //   1: on