ImageResource: Reset the encoded image size after receiving all data

third_party/WebKit/Source/core/fetch/ImageResourceTest.cpp

Index: third_party/WebKit/Source/core/fetch/ImageResourceTest.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ImageResourceTest.cpp b/third_party/WebKit/Source/core/fetch/ImageResourceTest.cpp
index 4389f64bcc35631a24c1d8bced656addeb8cbd59..67dd795d6a066630ff70ac357991ced6f85f3a9d 100644
--- a/third_party/WebKit/Source/core/fetch/ImageResourceTest.cpp
+++ b/third_party/WebKit/Source/core/fetch/ImageResourceTest.cpp
@@ -365,7 +365,9 @@ TEST(ImageResourceTest, UpdateBitmapImages) {
       nullptr);
   cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()),
                           jpeg.size());
+  EXPECT_NE(0u, cachedImage->encodedSize());
   cachedImage->finish();
+  EXPECT_EQ(0u, cachedImage->encodedSize());
   EXPECT_FALSE(cachedImage->errorOccurred());
   ASSERT_TRUE(cachedImage->hasImage());
   EXPECT_FALSE(cachedImage->getImage()->isNull());