[blink] const& return for BlockPropertiesVector()

This is more consistent with other Vectors held in DEFINE_STATIC_LOCAL

R=andruud@chromium.org, yosin@chromium.org

Change-Id: I284527e376c7b7d31d986ca2e6fabdf72f353ac2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1645832
Auto-Submit: Gabriel Charette <gab@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666525}

third_party/blink/renderer/core/css/css_property_value_set.cc

@@ -507,7 +507,7 @@ void MutableCSSPropertyValueSet::Clear() {
   property_vector_.clear();
 }
 
-inline bool ContainsId(const CSSProperty** set,
+inline bool ContainsId(const CSSProperty* const set[],
                        unsigned length,
                        CSSPropertyID id) {
   for (unsigned i = 0; i < length; ++i) {
@@ -517,8 +517,9 @@ inline bool ContainsId(const CSSProperty** set,
   return false;
 }
 
-bool MutableCSSPropertyValueSet::RemovePropertiesInSet(const CSSProperty** set,
-                                                       unsigned length) {
+bool MutableCSSPropertyValueSet::RemovePropertiesInSet(
+    const CSSProperty* const set[],
+    unsigned length) {
   if (property_vector_.IsEmpty())
     return false;
 

third_party/blink/renderer/core/css/css_property_value_set.h

@@ -268,7 +268,7 @@ class CORE_EXPORT MutableCSSPropertyValueSet : public CSSPropertyValueSet {
 
   template <typename T>  // CSSPropertyID or AtomicString
   bool RemoveProperty(T property, String* return_text = nullptr);
-  bool RemovePropertiesInSet(const CSSProperty** set, unsigned length);
+  bool RemovePropertiesInSet(const CSSProperty* const set[], unsigned length);
   void RemoveEquivalentProperties(const CSSPropertyValueSet*);
   void RemoveEquivalentProperties(const CSSStyleDeclaration*);
 

third_party/blink/renderer/core/editing/editing_style.cc

@@ -703,7 +703,7 @@ static const CSSPropertyID kStaticBlockProperties[] = {
     CSSPropertyID::kTextAlignLast, CSSPropertyID::kTextIndent,
     CSSPropertyID::kTextJustify, CSSPropertyID::kWidows};
 
-static Vector<const CSSProperty*>& BlockPropertiesVector() {
+static const Vector<const CSSProperty*>& BlockPropertiesVector() {
   DEFINE_STATIC_LOCAL(Vector<const CSSProperty*>, properties, ());
   if (properties.IsEmpty()) {
     CSSProperty::FilterEnabledCSSPropertiesIntoVector(