Introduce v8-cache-strategies-for-cache-storage setting flags.

third_party/WebKit/Source/core/frame/Settings.in

 # Defines properties which are available on the Settings object.
 #
 # Please think carefully before adding a new Setting.  Some questions to
 # consider are:
 # - Should this be a RuntimeEnabledFeature instead? Settings are for things
 #   which we support either values of at runtime.  Features are set at renderer
 #   process startup and are never changed. Features also tend to be set to a
 #   value based on the platform or the stability of the code in question, where
 #   as settings both codepaths need to be stable.
 # - How will you ensure test coverage of all relevant values of your setting?
@@ skipping 290 matching lines @@
 
 # This value is set to false if the platform does not support fullscreen.
 # When set to false all the requests to enter fullscreen will return an error
 # (fullscreenerror or webkitfullscreenerror) as specified in the standard:
 # http://fullscreen.spec.whatwg.org/#dom-element-requestfullscreen
 fullscreenSupported initial=true
 
 # V8 supports different types of caching. Used by V8 bindings.
 v8CacheOptions type=V8CacheOptions, initial=V8CacheOptionsDefault
 
+# V8 code cache for CacheStorage supports three type strategies(none, normal and aggressive).

[falken, 2016/04/27 08:07:37]

nit: "three types of strategies", space before "(none)"

[horo, 2016/04/27 08:15:36]

Done.

+v8CacheStrategiesForCacheStorage type=V8CacheStrategiesForCacheStorage, initial=V8CacheStrategiesForCacheStorageDefault
+
 # These values are bit fields for the properties of available pointing devices
 # and may take on multiple values (e.g. laptop with touchpad and touchscreen
 # has pointerType coarse *and* fine).
 availablePointerTypes type=int, initial=PointerTypeNone, invalidate=MediaQuery
 availableHoverTypes type=int, initial=HoverTypeNone, invalidate=MediaQuery
 
 # These values specify properties of the user's primary pointing device only.
 primaryPointerType type=PointerType, initial=PointerTypeNone, invalidate=MediaQuery
 primaryHoverType type=HoverType, initial=HoverTypeNone, invalidate=MediaQuery
 
@@ skipping 72 matching lines @@
 # The autoplay gesture override experiment is described in crbug.com/487345 .
 autoplayExperimentMode type=String, initial="off"
 
 # When DevTools is emulating mobile device, frame resize may mean device size has changed,
 # which in turn affects media queries.
 resizeIsDeviceSizeChange initial=false
 
 # Whether the browser process sends gesture events for wheel events.
 # Can be removed when crbug.com/598798 is fixed.
 wheelGesturesEnabled initial=false