Allow turning on selection painting without selection gaps via window.internals.

BUG=474759

Review URL: https://codereview.chromium.org/1328293002

git-svn-id: svn://svn.chromium.org/blink/trunk@201943 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/testing/Internals.cpp

@@ -2498,6 +2498,11 @@ void Internals::setCapsLockState(bool enabled)
         PlatformKeyboardEvent::OverrideCapsLockState::On : PlatformKeyboardEvent::OverrideCapsLockState::Off);
 }
 
+void Internals::setSelectionPaintingWithoutSelectionGapsEnabled(bool enabled)
+{
+    RuntimeEnabledFeatures::setSelectionPaintingWithoutSelectionGapsEnabled(enabled);
+}
+
 bool Internals::setScrollbarVisibilityInScrollableArea(Node* node, bool visible)
 {
     LayoutObject* layoutObject = node->layoutObject();

third_party/WebKit/Source/core/testing/Internals.h

@@ -378,6 +378,8 @@ public:
 
     void setCapsLockState(bool enabled);
 
+    void setSelectionPaintingWithoutSelectionGapsEnabled(bool);
+
     bool setScrollbarVisibilityInScrollableArea(Node*, bool visible);
 
     void forceRestrictIFramePermissions();

third_party/WebKit/Source/core/testing/Internals.idl

@@ -343,6 +343,7 @@
 
     ClientRectList outlineRects(Element element);
     void setCapsLockState(boolean enabled);
+    void setSelectionPaintingWithoutSelectionGapsEnabled(boolean enabled);
 
     // Returns whether the scrollbar was able to be shown or hidden; not all platforms
     // support overlay scrollbars.