Begin to enable extension APIs in Extension Service Worker.

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

Index: third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp b/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
index 8b55d51faf15338425df161d73919986ac2e1001..cd6f6410314db924db41fba89bb403daf7e0193a 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
@@ -31,6 +31,7 @@
 #include "bindings/core/v8/WorkerOrWorkletScriptController.h"
 
 #include "bindings/core/v8/ScriptCallStack.h"
+#include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/ScriptSourceCode.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/V8DedicatedWorkerGlobalScope.h"
@@ -51,6 +52,7 @@
 #include "core/workers/WorkerThread.h"
 #include "platform/heap/ThreadState.h"
 #include "public/platform/Platform.h"
+#include "wtf/Threading.h"
 #include <v8.h>
 
 namespace blink {
@@ -107,6 +109,17 @@ RawPtr<WorkerOrWorkletScriptController> WorkerOrWorkletScriptController::create(
     return new WorkerOrWorkletScriptController(globalScope, isolate);
 }
 
+void WorkerOrWorkletScriptController::registerExtensionIfNeeded(v8::Extension* extension)
+{
+    const V8Extensions& extensions = registeredExtensions();
+    for (size_t i = 0; i < extensions.size(); ++i) {
+        if (extensions[i] == extension)
+            return;
+    }
+    v8::RegisterExtension(extension);
+    registeredExtensions().append(extension);
+}
+
 WorkerOrWorkletScriptController::WorkerOrWorkletScriptController(WorkerOrWorkletGlobalScope* globalScope, v8::Isolate* isolate)
     : m_globalScope(globalScope)
     , m_isolate(isolate)
@@ -156,7 +169,14 @@ bool WorkerOrWorkletScriptController::initializeContextIfNeeded()
     if (isContextInitialized())
         return true;
 
-    v8::Local<v8::Context> context = v8::Context::New(m_isolate);
+    // Initialize V8 extensions before creating the context.
+    Vector<const char*> extensionNames;
+    const V8Extensions& extensions = registeredExtensions();
+    extensionNames.reserveInitialCapacity(extensions.size());
+    for (const auto* extension : extensions)
+        extensionNames.append(extension->name());
+    v8::ExtensionConfiguration extensionConfiguration(extensionNames.size(), extensionNames.data());
+    v8::Local<v8::Context> context = v8::Context::New(m_isolate, &extensionConfiguration);
     if (context.IsEmpty())
         return false;
 
@@ -192,6 +212,13 @@ bool WorkerOrWorkletScriptController::initializeContextIfNeeded()
     return v8CallBoolean(globalObject->SetPrototype(context, jsGlobalScope));
 }
 
+V8Extensions& WorkerOrWorkletScriptController::registeredExtensions()
+{
+    // Accessed from worker threads.
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(V8Extensions, extensions, new V8Extensions);
+    return extensions;
+}
+
 ScriptValue WorkerOrWorkletScriptController::evaluate(const CompressibleString& script, const String& fileName, const TextPosition& scriptStartPosition, CachedMetadataHandler* cacheHandler, V8CacheOptions v8CacheOptions)
 {
     if (!initializeContextIfNeeded())