base: Remove the string logging from CHECK().

base/test/multiprocess_test_android.cc

Index: base/test/multiprocess_test_android.cc
diff --git a/base/test/multiprocess_test_android.cc b/base/test/multiprocess_test_android.cc
index f58b452d1cb316184884c6e7e19a196ed6a90c8c..87cd5eb23e920eac4323275862e3a066b9121ce2 100644
--- a/base/test/multiprocess_test_android.cc
+++ b/base/test/multiprocess_test_android.cc
@@ -143,7 +143,8 @@ void LaunchHelper::Init(MainFunction main) {
   CHECK_NE(-1, fds[1]);
 
   pid_t pid = fork();
-  PCHECK(pid >= 0) << "Fork failed";
+  // Fork failed
+  CHECK(pid >= 0);
   if (pid) {
     // Parent.
     rv = close(fds[1]);
@@ -240,7 +241,8 @@ void LaunchHelper::DoHelper(int fd) {
 void LaunchHelper::StartProcessInHelper(const StartProcessRequest* request,
                                         std::vector<ScopedFD> fds) {
   pid_t pid = fork();
-  PCHECK(pid >= 0) << "Fork failed";
+  // Fork failed
+  CHECK(pid >= 0);
   if (pid) {
     // Helper.
     StartProcessResponse resp;