Apply a few missing const qualifiers in net/

net/base/mime_util.cc

Index: net/base/mime_util.cc
diff --git a/net/base/mime_util.cc b/net/base/mime_util.cc
index f851ecd13785764d6b3a18825801a13411eca91a..5376ef369a5e075218733dda0b4d693e596ba9c9 100644
--- a/net/base/mime_util.cc
+++ b/net/base/mime_util.cc
@@ -714,7 +714,7 @@ namespace {
 
 // From http://www.w3schools.com/media/media_mimeref.asp and
 // http://plugindoc.mozdev.org/winmime.php
-static const char* kStandardImageTypes[] = {
+static const char* const kStandardImageTypes[] = {
   "image/bmp",
   "image/cis-cod",
   "image/gif",
@@ -738,7 +738,7 @@ static const char* kStandardImageTypes[] = {
   "image/x-xpixmap",
   "image/x-xwindowdump"
 };
-static const char* kStandardAudioTypes[] = {
+static const char* const kStandardAudioTypes[] = {
   "audio/aac",
   "audio/aiff",
   "audio/amr",
@@ -757,7 +757,7 @@ static const char* kStandardAudioTypes[] = {
   "audio/vnd.rn-realaudio",
   "audio/vnd.wave"
 };
-static const char* kStandardVideoTypes[] = {
+static const char* const kStandardVideoTypes[] = {
   "video/avi",
   "video/divx",
   "video/flc",
@@ -776,7 +776,7 @@ static const char* kStandardVideoTypes[] = {
 
 struct StandardType {
   const char* leading_mime_type;
-  const char** standard_types;
+  const char* const* standard_types;
   size_t standard_types_len;
 };
 static const StandardType kStandardTypes[] = {
@@ -809,7 +809,7 @@ void GetExtensionsFromHardCodedMappings(
   }
 }
 
-void GetExtensionsHelper(const char** standard_types,
+void GetExtensionsHelper(const char* const* standard_types,
                          size_t standard_types_len,
                          const std::string& leading_mime_type,
                          base::hash_set<FilePath::StringType>* extensions) {