blink: honor renderer caret_blink_interval in non-default themes

third_party/WebKit/Source/core/layout/LayoutTheme.h

Index: third_party/WebKit/Source/core/layout/LayoutTheme.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTheme.h b/third_party/WebKit/Source/core/layout/LayoutTheme.h
index cad575fd8978c2969fd2ac74a62c1f36cad5c423..84ad07a945ae9e5190416d8e2413a41b49c7aea8 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTheme.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTheme.h
@@ -130,7 +130,8 @@ public:
     virtual Color platformDefaultCompositionBackgroundColor() const { return defaultCompositionBackgroundColor; }
     virtual void platformColorsDidChange();
 
-    virtual double caretBlinkInterval() const { return 0.5; }
+    void setCaretBlinkInterval(double);
+    virtual double caretBlinkInterval() const;
 
     // System fonts and colors for CSS.
     virtual void systemFont(CSSValueID systemFontID, FontStyle&, FontWeight&, float& fontSize, AtomicString& fontFamily) const = 0;
@@ -242,6 +243,7 @@ private:
 
     Color m_customFocusRingColor;
     bool m_hasCustomFocusRingColor;
+    double m_caretBlinkInterval = 0.5;
 
     // This color is expected to be drawn on a semi-transparent overlay,
     // making it more transparent than its alpha value indicates.