Trace FrameLoader object snapshots

third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp

Index: third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp b/third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp
index 92eaeb32698f705e00b349bcd2e521aeb769c4c4..ed1e41ed97425a5440dba9133b012a7789ae4ebc 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp
@@ -29,6 +29,7 @@
 #include "core/loader/FrameLoaderStateMachine.h"
 
 #include "wtf/Assertions.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
@@ -64,4 +65,20 @@ void FrameLoaderStateMachine::advanceTo(State state)
     m_state = state;
 }
 
+String FrameLoaderStateMachine::toString() const
+{
+    switch (m_state) {
+    case CreatingInitialEmptyDocument:
+        return "CreatingInitialEmptyDocument";
+    case DisplayingInitialEmptyDocument:
+        return "DisplayingInitialEmptyDocument";
+    case CommittedFirstRealLoad:
+        return "CommittedFirstRealLoad";
+    case CommittedMultipleRealLoads:
+        return "CommittedMultipleRealLoads";
+    default:
+        ASSERT_NOT_REACHED();
+    }
+}
+
 } // namespace blink