Deoptimize context value in Turbofan (and Crankshaft).

test/mjsunit/debug-clearbreakpointgroup.js

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 // Flags: --expose-debug-as debug
+// Flags: --turbo-deoptimization
 // Get the Debug object exposed from the debug context global object.
 var Debug = debug.Debug
 
 // Simple function which stores the last debug event.
 var listenerComplete = false;
 var exception = false;
 
 var base_request = '"seq":0,"type":"request","command":"clearbreakpointgroup"';
 var scriptId = null;
 
@@ skipping 74 matching lines @@
 // Check that all breakpoints from group 1 were deleted and all the
 // rest are preserved.
 assertEquals([bp2, bp3, bp5].sort(), breakpointNumbers.sort());
 
 assertFalse(exception, "exception in listener");
 
 // Clear all breakpoints to allow the test to run again (--stress-opt).
 Debug.clearBreakPoint(bp2);
 Debug.clearBreakPoint(bp3);
 Debug.clearBreakPoint(bp5);