base: Remove the string logging from CHECK().

chromeos/printing/ppd_provider.cc

Index: chromeos/printing/ppd_provider.cc
diff --git a/chromeos/printing/ppd_provider.cc b/chromeos/printing/ppd_provider.cc
index 1d85f0a339ec6a2c633331cb3bf0af3b637bf379..06ccd780c492a6eab4b6ae12fdd55d4579e3566f 100644
--- a/chromeos/printing/ppd_provider.cc
+++ b/chromeos/printing/ppd_provider.cc
@@ -108,8 +108,7 @@ class PpdProviderImpl : public PpdProvider {
   void Resolve(const Printer::PpdReference& ppd_reference,
                const PpdProvider::ResolveCallback& cb) override {
     CHECK(!cb.is_null());
-    CHECK(base::SequencedTaskRunnerHandle::IsSet())
-        << "Resolve must be called from a SequencedTaskRunner context";
+    CHECK(base::SequencedTaskRunnerHandle::IsSet());
     auto cache_result = base::MakeUnique<base::Optional<base::FilePath>>();
     auto* raw_cache_result_ptr = cache_result.get();
     bool post_result = io_task_runner_->PostTaskAndReply(
@@ -124,8 +123,7 @@ class PpdProviderImpl : public PpdProvider {
 
   void QueryAvailable(const QueryAvailableCallback& cb) override {
     CHECK(!cb.is_null());
-    CHECK(base::SequencedTaskRunnerHandle::IsSet())
-        << "QueryAvailable() must be called from a SequencedTaskRunner context";
+    CHECK(base::SequencedTaskRunnerHandle::IsSet());
     auto cache_result =
         base::MakeUnique<base::Optional<PpdProvider::AvailablePrintersMap>>();
     auto* raw_cache_result_ptr = cache_result.get();