[oilpan] Don't notify CachedResourceClients of cancel events when detaching the frame.

Source/core/loader/cache/CachedResource.cpp

Index: Source/core/loader/cache/CachedResource.cpp
diff --git a/Source/core/loader/cache/CachedResource.cpp b/Source/core/loader/cache/CachedResource.cpp
index 7b7df611652ba66a90322af6cc90eb72c6a60db3..b7d60fdd952d06994887120614e1937826497f87 100644
--- a/Source/core/loader/cache/CachedResource.cpp
+++ b/Source/core/loader/cache/CachedResource.cpp
@@ -475,8 +475,12 @@ CachedMetadata* CachedResource::cachedMetadata(unsigned dataTypeID) const
 
 void CachedResource::stopLoading()
 {
-    ASSERT(m_loader);            
+    ASSERT(m_loader);
+    bool isFrameDetaching = m_loader->frameLoader()->isFrameDetaching();
     m_loader = 0;
+    // Don't notify clients if the frame is being torn down.
+    if (isFrameDetaching)
+        return;
 
     CachedResourceHandle<CachedResource> protect(this);