Implement Blink-side changes to enable V8 code caching.

public/web/WebSettings.h

Index: public/web/WebSettings.h
diff --git a/public/web/WebSettings.h b/public/web/WebSettings.h
index 25b684a98d3c51c835226146f60beec1ae32cc46..e673ba24acabbb3c52af0f64c5faa04cb61835b3 100644
--- a/public/web/WebSettings.h
+++ b/public/web/WebSettings.h
@@ -52,6 +52,12 @@ public:
         EditingBehaviorAndroid
     };
 
+    enum V8CacheOptions {
+        V8CacheOptionsOff,
+        V8CacheOptionsParse,
+        V8CacheOptionsCode
+    };
+
     virtual bool mainFrameResizesAreOrientationChanges() const = 0;
     virtual bool shrinksViewportContentToFit() const = 0;
     virtual bool viewportEnabled() const = 0;
@@ -188,6 +194,7 @@ public:
     virtual void setUseSolidColorScrollbars(bool) = 0;
     virtual void setUseWideViewport(bool) = 0;
     virtual void setUsesEncodingDetector(bool) = 0;
+    virtual void setV8CacheOptions(V8CacheOptions) = 0;
     virtual void setValidationMessageTimerMagnification(int) = 0;
     virtual void setViewportEnabled(bool) = 0;
     virtual void setViewportMetaEnabled(bool) = 0;