Adding WebFallbackFont and renaming SimpleFontFamily

public/platform/linux/WebFontInfo.h

Index: public/platform/linux/WebFontInfo.h
diff --git a/public/platform/linux/WebFontInfo.h b/public/platform/linux/WebFontInfo.h
index e2db6e35ff2fdb77dee6eb6623f97b75bf2504c5..9213a93168fbd80f83c4a8d734902901dcf04e4a 100644
--- a/public/platform/linux/WebFontInfo.h
+++ b/public/platform/linux/WebFontInfo.h
@@ -32,6 +32,7 @@
 #define WebFontInfo_h
 
 #include "../WebCString.h"
+#include "WebFallbackFont.h"
 #include "WebFontFamily.h"
 #include "WebFontRenderStyle.h"
 
@@ -55,6 +56,9 @@ public:
     //
     // Returns: the font family or an empty string if the request could not be satisfied.
     // Returns: the font family instance. The instance has an empty font name if the request could not be satisfied.
+    BLINK_EXPORT static void fallbackFontForChar(const WebUChar32 character, const char* preferredLocale, WebFallbackFont*);
+
+    // TODO(dro): Remove this legacy version, kept until renames on the Chromium side are done. crbug.com/382411
     BLINK_EXPORT static void familyForChar(const WebUChar32 character, const char* preferredLocale, WebFontFamily*);
 
     // Fill out the given WebFontRenderStyle with the user's preferences for