Fix a few instances of missing "const".

Found via SuperSize query:
  size_info.symbols.WhereFullNameMatches(r'\bk[A-Z]').WhereInSection('d')

TBR=agrieve  # Trivial refactor

Bug: 747064
Change-Id: Ib9615718e0f6cacb081f9ea2f5295348d32cdcb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1901641
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713557}

components/ntp_snippets/features.cc

@@ -87,7 +87,7 @@ const char kDefaultReferrerUrl[] =
 // Provides ability to customize the referrer URL.
 // When specifying a referrer through a field trial, it must contain a path.
 // In case of default value above the path is empty, but it is specified.
-base::FeatureParam<std::string> kArticleSuggestionsReferrerURLParam{
+const base::FeatureParam<std::string> kArticleSuggestionsReferrerURLParam{
     &kArticleSuggestionsFeature, "referrer_url", kDefaultReferrerUrl};
 
 std::string GetContentSuggestionsReferrerURL() {

components/password_manager/core/common/password_manager_features.cc

@@ -88,24 +88,24 @@ const base::Feature kStickyBubble{"PasswordManagerStickyBubble",
                                   base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Field trial identifier for password generation requirements.
-const char* kGenerationRequirementsFieldTrial =
+const char kGenerationRequirementsFieldTrial[] =
     "PasswordGenerationRequirements";
 
 // The file version number of password requirements files. If the prefix length
 // changes, this version number needs to be updated.
 // Default to 0 in order to get an empty requirements file.
-const char* kGenerationRequirementsVersion = "version";
+const char kGenerationRequirementsVersion[] = "version";
 
 // Length of a hash prefix of domain names. This is used to shard domains
 // across multiple files.
 // Default to 0 in order to put all domain names into the same shard.
-const char* kGenerationRequirementsPrefixLength = "prefix_length";
+const char kGenerationRequirementsPrefixLength[] = "prefix_length";
 
 // Timeout (in milliseconds) for password requirements lookups. As this is a
 // network request in the background that does not block the UI, the impact of
 // high values is not strong.
 // Default to 5000 ms.
-const char* kGenerationRequirementsTimeout = "timeout";
+const char kGenerationRequirementsTimeout[] = "timeout";
 
 }  // namespace features
 

components/password_manager/core/common/password_manager_features.h

@@ -42,10 +42,10 @@ extern const base::Feature kStickyBubble;
 //   --force-fieldtrials=PasswordGenerationRequirements/Enabled
 //   --force-fieldtrial-params=PasswordGenerationRequirements.Enabled:\
 //       version/0/prefix_length/0/timeout/5000
-extern const char* kGenerationRequirementsFieldTrial;
-extern const char* kGenerationRequirementsVersion;
-extern const char* kGenerationRequirementsPrefixLength;
-extern const char* kGenerationRequirementsTimeout;
+extern const char kGenerationRequirementsFieldTrial[];
+extern const char kGenerationRequirementsVersion[];
+extern const char kGenerationRequirementsPrefixLength[];
+extern const char kGenerationRequirementsTimeout[];
 
 }  // namespace features
 

content/browser/devtools/protocol/tethering_handler.cc

@@ -33,7 +33,7 @@ const int kSocketPumpBufferSize = 16 * 1024;
 const int kMinTetheringPort = 1024;
 const int kMaxTetheringPort = 65535;
 
-net::NetworkTrafficAnnotationTag kTrafficAnnotation =
+const net::NetworkTrafficAnnotationTag kTrafficAnnotation =
     net::DefineNetworkTrafficAnnotation("tethering_handler_socket", R"(
         semantics {
           sender: "Tethering Handler"

net/socket/socket_bio_adapter.cc

@@ -22,7 +22,7 @@
 
 namespace {
 
-net::NetworkTrafficAnnotationTag kTrafficAnnotation =
+const net::NetworkTrafficAnnotationTag kTrafficAnnotation =
     net::DefineNetworkTrafficAnnotation("socket_bio_adapter", R"(
       semantics {
         sender: "Socket BIO Adapter"

third_party/blink/renderer/modules/media_controls/media_controls_impl.cc

@@ -105,7 +105,7 @@ constexpr int kMinWidthForOverlayPlayButton = 72;
 
 constexpr int kMinScrubbingMessageWidth = 300;
 
-const char* kStateCSSClasses[8] = {
+const char* const kStateCSSClasses[8] = {
     "state-no-source",                 // kNoSource
     "state-no-metadata",               // kNotLoaded
     "state-loading-metadata-paused",   // kLoadingMetadataPaused

third_party/blink/renderer/platform/json/json_values.cc

@@ -87,9 +87,9 @@ void WriteIndent(int depth, StringBuilder* output) {
 
 }  // anonymous namespace
 
-const char* kJSONNullString = "null";
-const char* kJSONTrueString = "true";
-const char* kJSONFalseString = "false";
+const char kJSONNullString[] = "null";
+const char kJSONTrueString[] = "true";
+const char kJSONFalseString[] = "false";
 
 void EscapeStringForJSON(const String& str, StringBuilder* dst) {
   for (unsigned i = 0; i < str.length(); ++i) {

third_party/blink/renderer/platform/json/json_values.h

@@ -265,9 +265,9 @@ class PLATFORM_EXPORT JSONArray : public JSONValue {
   Vector<std::unique_ptr<JSONValue>> data_;
 };
 
-extern const char* kJSONNullString;
-extern const char* kJSONTrueString;
-extern const char* kJSONFalseString;
+extern const char kJSONNullString[];
+extern const char kJSONTrueString[];
+extern const char kJSONFalseString[];
 
 PLATFORM_EXPORT void EscapeStringForJSON(const String&, StringBuilder*);
 void DoubleQuoteStringForJSON(const String&, StringBuilder*);