base: Remove the string logging from CHECK().

ui/events/gesture_detection/gesture_provider_unittest.cc

Index: ui/events/gesture_detection/gesture_provider_unittest.cc
diff --git a/ui/events/gesture_detection/gesture_provider_unittest.cc b/ui/events/gesture_detection/gesture_provider_unittest.cc
index 7987d4aa7ff74f151a578fa2a73092c6f7efa82a..e08c0ea45727b23b76eeb27f870a7075a9138548 100644
--- a/ui/events/gesture_detection/gesture_provider_unittest.cc
+++ b/ui/events/gesture_detection/gesture_provider_unittest.cc
@@ -119,7 +119,8 @@ class GestureProviderTest : public testing::Test, public GestureProviderClient {
                                positions[2].x(),
                                positions[2].y());
       default:
-        CHECK(false) << "MockMotionEvent only supports 1-3 pointers";
+        // MockMotionEvent only supports 1-3 pointers
+        CHECK(false);
         return MockMotionEvent();
     }
   }