Checking if frame is complete and access duration doesn't need a decode

Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp

Index: Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp
diff --git a/Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp b/Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp
index 82eee74a217189327593dd2297de33b9167bc29b..be53c297f35f4e4d21fad6782af5ffd92c0eb4c4 100644
--- a/Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp
+++ b/Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp
@@ -185,6 +185,18 @@ bool DeferredImageDecoder::frameHasAlphaAtIndex(size_t index) const
     return m_actualDecoder ? m_actualDecoder->frameHasAlphaAtIndex(index) : m_frameGenerator->hasAlpha();
 }
 
+bool DeferredImageDecoder::frameIsCompleteAtIndex(size_t index) const
+{
+    // TODO: Implement this for deferred decoding.
+    return m_actualDecoder ? m_actualDecoder->frameIsCompleteAtIndex(index) : false;

[Peter Kasting, 2013/04/23 21:43:20]

Nit: Simpler:

    return m_actualDecoder && m_actualDecoder->frameIsCompleteAtIndex(index);

[Alpha Left Google, 2013/04/25 23:02:44]

Done.

+}
+
+float DeferredImageDecoder::frameDurationAtIndex(size_t index) const
+{
+    // TODO: Implement this for deferred decoding.
+    return m_actualDecoder ? m_actualDecoder->frameDurationAtIndex(index) : 0;
+}
+
 unsigned DeferredImageDecoder::frameBytesAtIndex(size_t index) const
 {
     // If frame decoding is deferred then it is not managed by MemoryCache