Initial implementation of bindings and basic classes for worklets.

third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp

Index: third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
diff --git a/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp b/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
index c64fc776dbe07fb27ad0f93be52256628ba34dfc..0c8b8fbbeeecc1c4a071b2b90b95f981726f826c 100644
--- a/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
+++ b/third_party/WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp
@@ -25,6 +25,7 @@
 
 #include "bindings/modules/v8/V8BindingForModules.h"
 
+#include "bindings/core/v8/IsolatedScriptController.h"
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "bindings/core/v8/SerializedScriptValueFactory.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
@@ -41,13 +42,16 @@
 #include "bindings/modules/v8/V8IDBIndex.h"
 #include "bindings/modules/v8/V8IDBKeyRange.h"
 #include "bindings/modules/v8/V8IDBObjectStore.h"
+#include "bindings/modules/v8/V8WorkletGlobalScope.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMArrayBufferView.h"
+#include "core/dom/ExecutionContext.h"
 #include "modules/indexeddb/IDBKey.h"
 #include "modules/indexeddb/IDBKeyPath.h"
 #include "modules/indexeddb/IDBKeyRange.h"
 #include "modules/indexeddb/IDBTracing.h"
 #include "modules/indexeddb/IDBValue.h"
+#include "modules/worklet/WorkletGlobalScope.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/SharedBuffer.h"
 #include "wtf/MathExtras.h"
@@ -159,6 +163,23 @@ v8::Local<v8::Value> toV8(const IDBAny* impl, v8::Local<v8::Object> creationCont
     return v8::Undefined(isolate);
 }
 
+v8::Local<v8::Value> toV8(WorkletGlobalScope* impl, v8::Local<v8::Object> creationContext, v8::Isolate* isolate)
+{
+    // Notice that we explicitly ignore creationContext because the
+    // WorkletGlobalScope has its own creationContext.
+
+    if (UNLIKELY(!impl))
+        return v8::Null(isolate);
+
+    IsolatedScriptController* script = impl->script();
+    if (!script)
+        return v8::Null(isolate);
+
+    v8::Local<v8::Object> global = script->context()->Global();
+    ASSERT(!global.IsEmpty());
+    return global;
+}
+
 static const size_t maximumDepth = 2000;
 
 static IDBKey* createIDBKeyFromValue(v8::Isolate* isolate, v8::Local<v8::Value> value, Vector<v8::Local<v8::Array>>& stack, ExceptionState& exceptionState, bool allowExperimentalTypes = false)
@@ -516,4 +537,27 @@ void assertPrimaryKeyValidOrInjectable(ScriptState* scriptState, const IDBValue*
 }
 #endif
 
+ExecutionContext* toExecutionContextForModules(v8::Local<v8::Context> context)
+{
+    if (context.IsEmpty())
+        return 0;

[haraken, 2016/01/05 06:08:06]

nullptr

[ikilpatrick, 2016/01/07 22:47:35]

Done.

+    v8::Local<v8::Object> global = context->Global();
+    v8::Local<v8::Object> workletWrapper = V8WorkletGlobalScope::findInstanceInPrototypeChain(global, context->GetIsolate());
+    if (!workletWrapper.IsEmpty())
+        return V8WorkletGlobalScope::toImpl(workletWrapper);
+    // FIXME: Is this line of code reachable?
+    return 0;

[haraken, 2016/01/05 06:08:06]

nullptr

[ikilpatrick, 2016/01/07 22:47:35]

Done.

+}
+
+v8::Local<v8::Context> toV8ContextForModules(ExecutionContext* context)
+{
+    if (context->isWorkletGlobalScope()) {
+        if (IsolatedScriptController* script = toWorkletGlobalScope(context)->script()) {
+            if (script->scriptState()->contextIsValid())
+                return script->scriptState()->context();
+        }
+    }
+    return v8::Local<v8::Context>();
+}
+
 } // namespace blink