base: Remove the string logging from CHECK().

remoting/test/cyclic_frame_generator.cc

Index: remoting/test/cyclic_frame_generator.cc
diff --git a/remoting/test/cyclic_frame_generator.cc b/remoting/test/cyclic_frame_generator.cc
index ef59810efc3f36ae947fa653cf5c37b76190e611..6e5904b6267ce0a50234e44b3f592adb7aa1d478 100644
--- a/remoting/test/cyclic_frame_generator.cc
+++ b/remoting/test/cyclic_frame_generator.cc
@@ -33,8 +33,8 @@ CyclicFrameGenerator::CyclicFrameGenerator(
   CHECK(!reference_frames_.empty());
   screen_size_ = reference_frames_[0]->size();
   for (const auto& frame : reference_frames_) {
-    CHECK(screen_size_.equals(frame->size()))
-        << "All reference frames should have the same size.";
+    // All reference frames should have the same size.
+    CHECK(screen_size_.equals(frame->size()));
   }
 }