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

Source/core/loader/FrameLoader.cpp

Index: Source/core/loader/FrameLoader.cpp
diff --git a/Source/core/loader/FrameLoader.cpp b/Source/core/loader/FrameLoader.cpp
index 529191ca6e437ccbcd38f67367432a24e5252e0b..6d85b6196403bb0ba98fdf726a2102141cf09183 100644
--- a/Source/core/loader/FrameLoader.cpp
+++ b/Source/core/loader/FrameLoader.cpp
@@ -224,6 +224,7 @@ FrameLoader::FrameLoader(Frame* frame, FrameLoaderClient* client)
     , m_didAccessInitialDocumentTimer(this, &FrameLoader::didAccessInitialDocumentTimerFired)
     , m_suppressOpenerInNewFrame(false)
     , m_forcedSandboxFlags(SandboxNone)
+    , m_frameDetaching(false)
 {
 }
 
@@ -2092,8 +2093,14 @@ void FrameLoader::handledOnloadEvents()
         documentLoader()->handledOnloadEvents();
 }
 
+bool FrameLoader::isFrameDetaching()
+{
+    return m_frameDetaching;
+}
+
 void FrameLoader::frameDetached()
 {
+    m_frameDetaching = true;
     // stopAllLoaders can detach the Frame, so protect it.
     RefPtr<Frame> protect(m_frame);
     stopAllLoaders();