Move HighContrastPagePolicy to high_contrast_settings.h.

Bug: 925949
Change-Id: I82760c97fd583bc509058fec4cd8540e4fe0e19c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1474514
Commit-Queue: Aran Gilman <gilmanmh@google.com>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637558}

third_party/blink/renderer/core/accessibility/apply_high_contrast_check.h

@@ -12,14 +12,6 @@
 
 namespace blink {
 
-// TODO(https://crbug.com/925949): Move this to high_contrast_settings.h.
-enum class HighContrastPagePolicy {
-  // Apply high-contrast filter to all frames, regardless of content.
-  kFilterAll,
-  // Apply high-contrast filter to frames based on background color.
-  kFilterByBackground,
-};
-
 // Extract high contrast settings from |settings| and modify them as needed
 // based on |layout_object|.
 HighContrastSettings CORE_EXPORT

third_party/blink/renderer/platform/graphics/high_contrast_settings.h

@@ -25,6 +25,13 @@ enum class HighContrastImagePolicy {
   kFilterSmart,
 };
 
+enum class HighContrastPagePolicy {
+  // Apply high-contrast filter to all frames, regardless of content.
+  kFilterAll,
+  // Apply high-contrast filter to frames based on background color.
+  kFilterByBackground,
+};
+
 struct HighContrastSettings {
   HighContrastMode mode = HighContrastMode::kOff;
   bool grayscale = false;