Introduce Platform::cacheMetadataInCacheStorage() to store V8 code cache in CacheStorage

third_party/WebKit/Source/bindings/core/v8/ScriptStreamer.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "bindings/core/v8/ScriptStreamer.h"
 
 #include "bindings/core/v8/ScriptStreamerThread.h"
 #include "bindings/core/v8/V8ScriptRunner.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
@@ skipping 262 matching lines @@
 
         // The Resource must still be alive; otherwise we should've cancelled
         // the streaming (if we have cancelled, the background thread is not
         // waiting).
         ASSERT(streamer->resource());
 
         // BOM can only occur at the beginning of the data.
         ASSERT(lengthOfBOM == 0 || m_queueTailPosition == 0);
 
         CachedMetadataHandler* cacheHandler = streamer->resource()->cacheHandler();
-        if (cacheHandler && cacheHandler->cachedMetadata(V8ScriptRunner::tagForCodeCache(cacheHandler))) {
-            // The resource has a code cache, so it's unnecessary to stream and
-            // parse the code. Cancel the streaming and resume the non-streaming
-            // code path.
+        if (cacheHandler && (cacheHandler->shouldAggressivelyCache() || cacheHandler->cachedMetadata(V8ScriptRunner::tagForCodeCache(cacheHandler)))) {
+            // When we should aggressively cache the code cache, we can't use
+            // SourceStream because currently V8ScriptRunner doesn't supoprt
+            // code caching with SourceStream. And if the resource has a code
+            // cache, it's unnecessary to stream and parse the code.
+            // Cancel the streaming and resume the non-streaming code path.
             streamer->suppressStreaming();
             cancel();
             return;
         }
 
         if (!m_resourceBuffer) {
             // We don't have a buffer yet. Try to get it from the resource.
             SharedBuffer* buffer = streamer->resource()->resourceBuffer();
             m_resourceBuffer = RefPtr<SharedBuffer>(buffer);
         }
@@ skipping 369 matching lines @@
 
     // The Resource might go out of scope if the script is no longer
     // needed. This makes PendingScript notify the ScriptStreamer when it is
     // destroyed.
     script->setStreamer(ScriptStreamer::create(script, scriptType, scriptState, compileOption, loadingTaskRunner));
 
     return true;
 }
 
 } // namespace blink