Cleanup namespace usage in public/web/Web[A-M]*.h.

public/web/WebFontDescription.h

Index: public/web/WebFontDescription.h
diff --git a/public/web/WebFontDescription.h b/public/web/WebFontDescription.h
index 369599355123207458972037dff9c712e82c126e..cf0772fde3dd450e503872f833c8fb167360074a 100644
--- a/public/web/WebFontDescription.h
+++ b/public/web/WebFontDescription.h
@@ -33,12 +33,10 @@
 
 #include "../platform/WebString.h"
 
-#if BLINK_IMPLEMENTATION
-namespace blink { class FontDescription; }
-#endif
-
 namespace blink {
 
+class FontDescription;
+
 struct WebFontDescription {
     enum GenericFamily {
         GenericFamilyNone,
@@ -95,9 +93,8 @@ struct WebFontDescription {
     short wordSpacing;
 
 #if BLINK_IMPLEMENTATION
-    WebFontDescription(const blink::FontDescription&);
-
-    operator blink::FontDescription() const;
+    WebFontDescription(const FontDescription&);
+    operator FontDescription() const;
 #endif
 };