Deferred image decoding to handle broken GIFs

Source/platform/graphics/DeferredImageDecoderTest.cpp

Index: Source/platform/graphics/DeferredImageDecoderTest.cpp
diff --git a/Source/platform/graphics/DeferredImageDecoderTest.cpp b/Source/platform/graphics/DeferredImageDecoderTest.cpp
index 757cfc4a409b172d58868588f7df4055ecd308fb..fd20b70f99576212d6d9dd42152ab54c7486955f 100644
--- a/Source/platform/graphics/DeferredImageDecoderTest.cpp
+++ b/Source/platform/graphics/DeferredImageDecoderTest.cpp
@@ -325,4 +325,17 @@ TEST_F(DeferredImageDecoderTest, decodedSize)
     EXPECT_EQ(1, m_frameBufferRequestCount);
 }
 
+TEST_F(DeferredImageDecoderTest, smallerFrameCount)
+{
+    m_frameCount = 1;
+    m_lazyDecoder->setData(m_data.get(), false);
+    EXPECT_EQ(m_frameCount, m_lazyDecoder->frameCount());
+    m_frameCount = 2;
+    m_lazyDecoder->setData(m_data.get(), false);
+    EXPECT_EQ(m_frameCount, m_lazyDecoder->frameCount());
+    m_frameCount = 0;
+    m_lazyDecoder->setData(m_data.get(), true);
+    EXPECT_EQ(m_frameCount, m_lazyDecoder->frameCount());
+}
+
 } // namespace WebCore