base: Remove the string logging from CHECK().

extensions/common/manifest_test.cc

Index: extensions/common/manifest_test.cc
diff --git a/extensions/common/manifest_test.cc b/extensions/common/manifest_test.cc
index 6a966e60f0170353921aa8c48c7a68b0762a17fd..7aae33ec1496ea5178b102759f9e6ae0b560fd09 100644
--- a/extensions/common/manifest_test.cc
+++ b/extensions/common/manifest_test.cc
@@ -65,13 +65,15 @@ ManifestTest::ManifestData::ManifestData(const char* name)
 ManifestTest::ManifestData::ManifestData(base::DictionaryValue* manifest,
                                           const char* name)
     : name_(name), manifest_(manifest) {
-  CHECK(manifest_) << "Manifest NULL";
+  // Manifest NULL
+  CHECK(manifest_);
 }
 
 ManifestTest::ManifestData::ManifestData(
     std::unique_ptr<base::DictionaryValue> manifest)
     : manifest_(manifest.get()), manifest_holder_(std::move(manifest)) {
-  CHECK(manifest_) << "Manifest NULL";
+  // Manifest NULL
+  CHECK(manifest_);
 }
 
 ManifestTest::ManifestData::ManifestData(
@@ -80,7 +82,8 @@ ManifestTest::ManifestData::ManifestData(
     : name_(name),
       manifest_(manifest.get()),
       manifest_holder_(std::move(manifest)) {
-  CHECK(manifest_) << "Manifest NULL";
+  // Manifest NULL
+  CHECK(manifest_);
 }
 
 ManifestTest::ManifestData::ManifestData(const ManifestData& m) {