Update message that Main Thread Checker produces.

llvm-svn: 307464
diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/mtc/simple/TestMTCSimple.py b/lldb/packages/Python/lldbsuite/test/functionalities/mtc/simple/TestMTCSimple.py
index 0cf259d..6a779ec 100644
--- a/lldb/packages/Python/lldbsuite/test/functionalities/mtc/simple/TestMTCSimple.py
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/mtc/simple/TestMTCSimple.py
@@ -41,7 +41,7 @@
         thread = process.GetSelectedThread()
         frame = thread.GetSelectedFrame()
 
-        self.expect("thread info", substrs=['stop reason = -[NSView superview] must be called from main thread only'])
+        self.expect("thread info", substrs=['stop reason = -[NSView superview] must be used from main thread only'])
 
         self.expect(
             "thread info -s",
@@ -54,4 +54,4 @@
         self.assertEqual(data["api_name"], "-[NSView superview]")
         self.assertEqual(data["class_name"], "NSView")
         self.assertEqual(data["selector"], "superview")
-        self.assertEqual(data["description"], "-[NSView superview] must be called from main thread only")
+        self.assertEqual(data["description"], "-[NSView superview] must be used from main thread only")
diff --git a/lldb/source/Plugins/InstrumentationRuntime/MainThreadChecker/MainThreadCheckerRuntime.cpp b/lldb/source/Plugins/InstrumentationRuntime/MainThreadChecker/MainThreadCheckerRuntime.cpp
index 3c22b81..2ed7079 100644
--- a/lldb/source/Plugins/InstrumentationRuntime/MainThreadChecker/MainThreadCheckerRuntime.cpp
+++ b/lldb/source/Plugins/InstrumentationRuntime/MainThreadChecker/MainThreadCheckerRuntime.cpp
@@ -141,7 +141,7 @@
   d->AddStringItem("class_name", className);
   d->AddStringItem("selector", selector);
   d->AddStringItem("description",
-                   apiName + " must be called from main thread only");
+                   apiName + " must be used from main thread only");
   d->AddIntegerItem("tid", thread_sp->GetIndexID());
   d->AddItem("trace", trace_sp);
   return dict_sp;