Cleanup: Better constify some strings in chrome/browser/{chromeos,extensions}.

chrome/browser/chromeos/drive/search_metadata_unittest.cc

Index: chrome/browser/chromeos/drive/search_metadata_unittest.cc
diff --git a/chrome/browser/chromeos/drive/search_metadata_unittest.cc b/chrome/browser/chromeos/drive/search_metadata_unittest.cc
index aeec016c7a1236dffe917215d1aeecfe32995468..0f5f54caccd1b21730b4ad91b6ade43f19272acd 100644
--- a/chrome/browser/chromeos/drive/search_metadata_unittest.cc
+++ b/chrome/browser/chromeos/drive/search_metadata_unittest.cc
@@ -121,7 +121,6 @@ class SearchMetadataTest : public testing::Test {
     entry.mutable_file_specific_info()->set_content_mime_type(
         drive::util::kGoogleDocumentMimeType);
     EXPECT_EQ(FILE_ERROR_OK, resource_metadata_->AddEntry(entry, &local_id));
-
   }
 
   ResourceEntry GetFileEntry(const std::string& name,
@@ -382,7 +381,7 @@ TEST_F(SearchMetadataTest, SearchMetadata_ExcludeDirectory) {
 
 // "drive", "drive/root", "drive/other" should be excluded.
 TEST_F(SearchMetadataTest, SearchMetadata_ExcludeSpecialDirectories) {
-  const char* kQueries[] = { "drive", "root", "other" };
+  const char* const kQueries[] = { "drive", "root", "other" };
   for (size_t i = 0; i < arraysize(kQueries); ++i) {
     FileError error = FILE_ERROR_FAILED;
     scoped_ptr<MetadataSearchResultVector> result;