base: Remove the string logging from CHECK().

mojo/edk/test/test_utils_posix.cc

Index: mojo/edk/test/test_utils_posix.cc
diff --git a/mojo/edk/test/test_utils_posix.cc b/mojo/edk/test/test_utils_posix.cc
index 60d5db59db0063057c155c9da5e0de46ac0fc4f8..3f33cc5e0d701719d221ab8f1f7eeeea74d34e06 100644
--- a/mojo/edk/test/test_utils_posix.cc
+++ b/mojo/edk/test/test_utils_posix.cc
@@ -77,7 +77,8 @@ bool NonBlockingRead(const PlatformHandle& handle,
 ScopedPlatformHandle PlatformHandleFromFILE(base::ScopedFILE fp) {
   CHECK(fp);
   int rv = dup(fileno(fp.get()));
-  PCHECK(rv != -1) << "dup";
+  // dup
+  CHECK(rv != -1);
   return ScopedPlatformHandle(PlatformHandle(rv));
 }
 
@@ -85,7 +86,8 @@ base::ScopedFILE FILEFromPlatformHandle(ScopedPlatformHandle h,
                                         const char* mode) {
   CHECK(h.is_valid());
   base::ScopedFILE rv(fdopen(h.release().handle, mode));
-  PCHECK(rv) << "fdopen";
+  // fdopen
+  CHECK(rv);
   return rv;
 }