Update fontMgr to take list of bcp47 language tags.

src/ports/SkFontMgr_android.cpp

Index: src/ports/SkFontMgr_android.cpp
diff --git a/src/ports/SkFontMgr_android.cpp b/src/ports/SkFontMgr_android.cpp
index 5e93bf8a6208522c600bedca95d02529a3f7f570..adcf0d8ec6d82297fb5bebf76457179b83a0e9fa 100644
--- a/src/ports/SkFontMgr_android.cpp
+++ b/src/ports/SkFontMgr_android.cpp
@@ -346,8 +346,9 @@ protected:
 
     virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[],
                                                     const SkFontStyle& style,
-                                                    const char bpc47[],
-                                                    uint32_t character) const SK_OVERRIDE
+                                                    const char** bcp47,
+                                                    size_t bcpLength,
+                                                    SkUnichar character) const SK_OVERRIDE
     {
         // The variant 'elegant' is 'not squashed', 'compact' is 'stays in ascent/descent'.
         // The variant 'default' means 'compact and elegant'.
@@ -359,7 +360,8 @@ protected:
 
         // The first time match anything in the mask, second time anything not in the mask.
         for (bool maskMatches = true; maskMatches != false; maskMatches = false) {
-            SkLanguage lang(bpc47);
+            size_t bcpNext = 1;
+            SkLanguage lang((bcpLength > 0) ? bcp47[0] : NULL);
             // Match against the language, removing a segment each time.
             // The last time through the loop, the language will be empty.
             // The empty language is special, and matches all languages.
@@ -387,6 +389,13 @@ protected:
                         return face.detach();
                     }
                 }
+
+                // move onto the next language tag until we exhaust them and
+                // only then fall through to the default case (i.e. empty lang).
+                if (lang.getTag().isEmpty() && bcpNext < bcpLength) {
+                    lang.set(bcp47[bcpNext++]);
+                }
+
             } while (!lang.getTag().isEmpty() && (lang = lang.getParent(), true));
         }
         return NULL;