--- a/content/browser/accessibility/accessibility_tree_formatter_blink.cc	2018-03-13 21:40:54.741459989 +0100
+++ b/content/browser/accessibility/accessibility_tree_formatter_blink.cc	2018-03-13 21:50:37.661460741 +0100
@@ -4,7 +4,7 @@
 
 #include "content/browser/accessibility/accessibility_tree_formatter_blink.h"
 
-#include <math.h>
+#include <cmath>
 #include <stddef.h>
 
 #include <utility>
@@ -194,7 +194,7 @@
        attr_index <= ui::AX_FLOAT_ATTRIBUTE_LAST;
        ++attr_index) {
     auto attr = static_cast<ui::AXFloatAttribute>(attr_index);
-    if (node.HasFloatAttribute(attr) && isfinite(node.GetFloatAttribute(attr)))
+    if (node.HasFloatAttribute(attr) && std::isfinite(node.GetFloatAttribute(attr)))
       dict->SetDouble(ui::ToString(attr), node.GetFloatAttribute(attr));
   }
 
--- a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp	2018-03-07 00:05:05.000000000 +0100
+++ b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp	2018-03-14 09:52:43.832466351 +0100
@@ -1559,7 +1559,7 @@
 
   if (IsNativeSlider() || IsNativeSpinButton()) {
     *out_value = ToHTMLInputElement(*GetNode()).valueAsNumber();
-    return isfinite(*out_value);
+    return std::isfinite(*out_value);
   }
 
   if (auto* meter = ToHTMLMeterElementOrNull(GetNode())) {
@@ -1604,7 +1604,7 @@
 
   if (IsNativeSlider() || IsNativeSpinButton()) {
     *out_value = static_cast<float>(ToHTMLInputElement(*GetNode()).Maximum());
-    return isfinite(*out_value);
+    return std::isfinite(*out_value);
   }
 
   if (auto* meter = ToHTMLMeterElementOrNull(GetNode())) {
@@ -1637,7 +1637,7 @@
 
   if (IsNativeSlider() || IsNativeSpinButton()) {
     *out_value = static_cast<float>(ToHTMLInputElement(*GetNode()).Minimum());
-    return isfinite(*out_value);
+    return std::isfinite(*out_value);
   }
 
   if (auto* meter = ToHTMLMeterElementOrNull(GetNode())) {
@@ -1666,7 +1666,7 @@
     Decimal step =
         ToHTMLInputElement(*GetNode()).CreateStepRange(kRejectAny).Step();
     *out_value = step.ToString().ToFloat();
-    return isfinite(*out_value);
+    return std::isfinite(*out_value);
   }
 
   switch (AriaRoleAttribute()) {