Implement updateViaCache flag and no-cache by default for main service worker scripts

android_webview/tools/system_webview_shell/test/data/webexposed/global-interface-listing-expected.txt

Index: android_webview/tools/system_webview_shell/test/data/webexposed/global-interface-listing-expected.txt
diff --git a/android_webview/tools/system_webview_shell/test/data/webexposed/global-interface-listing-expected.txt b/android_webview/tools/system_webview_shell/test/data/webexposed/global-interface-listing-expected.txt
index f29be242022a9c98bdb30b843deb98a9ff194da1..855491780141794c65bdf5e3a2c40daa00737f35 100644
--- a/android_webview/tools/system_webview_shell/test/data/webexposed/global-interface-listing-expected.txt
+++ b/android_webview/tools/system_webview_shell/test/data/webexposed/global-interface-listing-expected.txt
@@ -1950,6 +1950,7 @@ interface HTMLLinkElement : HTMLElement
     getter sizes
     getter target
     getter type
+    getter useCache

[nhiroki, 2017/06/21 14:08:35]

s/useCache/updateViaCache/

[yuryu, 2017/07/20 10:15:12]

Done.

     method constructor
     setter as
     setter charset
@@ -1965,6 +1966,7 @@ interface HTMLLinkElement : HTMLElement
     setter sizes
     setter target
     setter type
+    setter useCache
 interface HTMLMapElement : HTMLElement
     getter areas
     getter name
@@ -4414,6 +4416,7 @@ interface ServiceWorkerRegistration : EventTarget
     getter onupdatefound
     getter scope
     getter sync
+    getter useCache
     method constructor
     method unregister
     method update