Cleanup: Better constify some strings in chrome.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index e68931019822e1e3786d313079841052af1c180d..d885877c4ebb67ec1925e631b52833380b3bcb24 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -940,7 +940,7 @@ GURL ChromeContentRendererClient::GetNaClContentHandlerURL(
     const std::string& actual_mime_type,
     const content::WebPluginInfo& plugin) {
   // Look for the manifest URL among the MIME type's additonal parameters.
-  const char* kNaClPluginManifestAttribute = "nacl";
+  const char kNaClPluginManifestAttribute[] = "nacl";
   base::string16 nacl_attr = ASCIIToUTF16(kNaClPluginManifestAttribute);
   for (size_t i = 0; i < plugin.mime_types.size(); ++i) {
     if (plugin.mime_types[i].mime_type == actual_mime_type) {