Rename ScaledImageCache.cpp to SkResourceCacheTest.cpp

BUG=skia:
R=junov@chromium.org, reed@android.com

Author: piotaixr@chromium.org

Review URL: https://codereview.chromium.org/518213003

gyp/tests.gypi

@@ -180,12 +180,12 @@
     '../tests/SHA1Test.cpp',
     '../tests/SListTest.cpp',
     '../tests/ScalarTest.cpp',
-    '../tests/ScaledImageCache.cpp',
     '../tests/SerializationTest.cpp',
     '../tests/ShaderImageFilterTest.cpp',
     '../tests/ShaderOpacityTest.cpp',
     '../tests/SizeTest.cpp',
     '../tests/SkBase64Test.cpp',
+    '../tests/SkResourceCacheTest.cpp',
     '../tests/SmallAllocatorTest.cpp',
     '../tests/SortTest.cpp',
     '../tests/SrcOverTest.cpp',