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

chrome/browser/extensions/error_console/error_console_browsertest.cc

Index: chrome/browser/extensions/error_console/error_console_browsertest.cc
diff --git a/chrome/browser/extensions/error_console/error_console_browsertest.cc b/chrome/browser/extensions/error_console/error_console_browsertest.cc
index f5ffa2ab15311d7d2b9b3c728b83218869a52c2d..a290b45335e7b0782da6b0fe9ed7bdbd5e899641 100644
--- a/chrome/browser/extensions/error_console/error_console_browsertest.cc
+++ b/chrome/browser/extensions/error_console/error_console_browsertest.cc
@@ -35,7 +35,7 @@ namespace {
 
 const char kTestingPage[] = "/extensions/test_file.html";
 const char kAnonymousFunction[] = "(anonymous function)";
-const char* kBackgroundPageName =
+const char* const kBackgroundPageName =
     extensions::kGeneratedBackgroundPageFilename;
 const int kNoFlags = 0;
 
@@ -274,6 +274,7 @@ class ErrorConsoleBrowserTest : public ExtensionBrowserTest {
   }
 
   ErrorConsole* error_console() { return error_console_; }
+
  private:
   // The URL used in testing for simple page navigations.
   GURL test_url_;
@@ -391,7 +392,7 @@ IN_PROC_BROWSER_TEST_F(ErrorConsoleBrowserTest,
                   script_url,
                   "logHelloWorld",  // function name
                   6u,  // line number
-                  11u /* column number */ );
+                  11u /* column number */);
 
   CheckStackFrame(stack_trace1[1],
                   script_url,