create SkBitmapProvider to abstract images and bitmaps

tests/SkResourceCacheTest.cpp

Index: tests/SkResourceCacheTest.cpp
diff --git a/tests/SkResourceCacheTest.cpp b/tests/SkResourceCacheTest.cpp
index cf8327fcdeccd8b2d135bcfa5fae29da70fa7f87..9df15192d86670b2dfd8cf11263b70d6e0f4a26c 100644
--- a/tests/SkResourceCacheTest.cpp
+++ b/tests/SkResourceCacheTest.cpp
@@ -23,7 +23,7 @@ static bool is_in_scaled_image_cache(const SkBitmap& orig,
     SkBitmap scaled;
     int width = SkScalarRoundToInt(orig.width() * xScale);
     int height = SkScalarRoundToInt(orig.height() * yScale);
-    return SkBitmapCache::FindWH(orig, width, height, &scaled);
+    return SkBitmapCache::FindWH(SkBitmapCacheDesc::Make(orig, width, height), &scaled);
 }
 
 // Draw a scaled bitmap, then return true if it has been cached.
@@ -153,14 +153,14 @@ static void test_mipmapcache(skiatest::Reporter* reporter, SkResourceCache* cach
     src.allocN32Pixels(5, 5);
     src.setImmutable();
 
-    const SkMipMap* mipmap = SkMipMapCache::FindAndRef(src, cache);
+    const SkMipMap* mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src), cache);
     REPORTER_ASSERT(reporter, nullptr == mipmap);
 
     mipmap = SkMipMapCache::AddAndRef(src, cache);
     REPORTER_ASSERT(reporter, mipmap);
 
     {
-        const SkMipMap* mm = SkMipMapCache::FindAndRef(src, cache);
+        const SkMipMap* mm = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src), cache);
         REPORTER_ASSERT(reporter, mm);
         REPORTER_ASSERT(reporter, mm == mipmap);
         mm->unref();
@@ -174,7 +174,7 @@ static void test_mipmapcache(skiatest::Reporter* reporter, SkResourceCache* cach
     check_data(reporter, mipmap, 1, kInCache, kNotLocked);
 
     // find us again
-    mipmap = SkMipMapCache::FindAndRef(src, cache);
+    mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src), cache);
     check_data(reporter, mipmap, 2, kInCache, kLocked);
 
     cache->purgeAll();
@@ -193,7 +193,7 @@ static void test_mipmap_notify(skiatest::Reporter* reporter, SkResourceCache* ca
     }
 
     for (int i = 0; i < N; ++i) {
-        const SkMipMap* mipmap = SkMipMapCache::FindAndRef(src[i], cache);
+        const SkMipMap* mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src[i]), cache);
         if (cache) {
             // if cache is null, we're working on the global cache, and other threads might purge
             // it, making this check fragile.
@@ -203,7 +203,7 @@ static void test_mipmap_notify(skiatest::Reporter* reporter, SkResourceCache* ca
 
         src[i].reset(); // delete the underlying pixelref, which *should* remove us from the cache
 
-        mipmap = SkMipMapCache::FindAndRef(src[i], cache);
+        mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src[i]), cache);
         REPORTER_ASSERT(reporter, !mipmap);
     }
 }