Deprecate Android-specific SkPaint functions.

The following functions were problematic:
 const SkGlyph& getUnicharMetrics(SkUnichar, const SkMatrix*);
 const SkGlyph& getGlyphMetrics(uint16_t, const SkMatrix*);
 const void* findImage(const SkGlyph&, const SkMatrix*);

Replacing them with calls through SkGlyphCache solved a nasty crash
bug, so they have all been deprecated.

Bug: 11968757
Change-Id: Id746315d41aec5b211b78b172a883c2061130f08
diff --git a/libs/hwui/font/Font.cpp b/libs/hwui/font/Font.cpp
index 18983d8..3e0124c 100644
--- a/libs/hwui/font/Font.cpp
+++ b/libs/hwui/font/Font.cpp
@@ -23,6 +23,7 @@
 #include <utils/Trace.h>
 
 #include <SkGlyph.h>
+#include <SkGlyphCache.h>
 #include <SkUtils.h>
 
 #include "FontUtil.h"
@@ -271,8 +272,8 @@
     if (cachedGlyph) {
         // Is the glyph still in texture cache?
         if (!cachedGlyph->mIsValid) {
-            const SkGlyph& skiaGlyph = GET_METRICS(paint, textUnit,
-                    &mDescription.mLookupTransform);
+            SkAutoGlyphCache autoCache(*paint, NULL, &mDescription.mLookupTransform);
+            const SkGlyph& skiaGlyph = GET_METRICS(autoCache.getCache(), textUnit);
             updateGlyphCache(paint, skiaGlyph, cachedGlyph, precaching);
         }
     } else {
@@ -428,8 +429,9 @@
     uint32_t startY = 0;
 
     // Get the bitmap for the glyph
+    SkAutoGlyphCache autoCache(*paint, NULL, &mDescription.mLookupTransform);
     if (!skiaGlyph.fImage) {
-        paint->findImage(skiaGlyph, &mDescription.mLookupTransform);
+        autoCache.getCache()->findImage(skiaGlyph);
     }
     mState->cacheBitmap(skiaGlyph, glyph, &startX, &startY, precaching);
 
@@ -463,7 +465,8 @@
     CachedGlyphInfo* newGlyph = new CachedGlyphInfo();
     mCachedGlyphs.add(glyph, newGlyph);
 
-    const SkGlyph& skiaGlyph = GET_METRICS(paint, glyph, &mDescription.mLookupTransform);
+    SkAutoGlyphCache autoCache(*paint, NULL, &mDescription.mLookupTransform);
+    const SkGlyph& skiaGlyph = GET_METRICS(autoCache.getCache(), glyph);
     newGlyph->mIsValid = false;
     newGlyph->mGlyphIndex = skiaGlyph.fID;