TestingPlatformSupport: register Platform instance correctly

third_party/WebKit/Source/platform/fonts/FontCacheTest.cpp

Index: third_party/WebKit/Source/platform/fonts/FontCacheTest.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/FontCacheTest.cpp b/third_party/WebKit/Source/platform/fonts/FontCacheTest.cpp
index 8f2dc92fdd4cc426ba4019d967d3142cba85a34f..ba35d668c32687d05bd0136e580ada734325706c 100644
--- a/third_party/WebKit/Source/platform/fonts/FontCacheTest.cpp
+++ b/third_party/WebKit/Source/platform/fonts/FontCacheTest.cpp
@@ -12,18 +12,10 @@
 
 namespace blink {
 
-class EmptyPlatform : public TestingPlatformSupport {
- public:
-  EmptyPlatform() {}
-  ~EmptyPlatform() override {}
-};
-
 TEST(FontCache, getLastResortFallbackFont) {
   FontCache* fontCache = FontCache::fontCache();
   ASSERT_TRUE(fontCache);
 
-  EmptyPlatform platform;
-
   FontDescription fontDescription;
   fontDescription.setGenericFamily(FontDescription::StandardFamily);
   RefPtr<SimpleFontData> fontData =