Make worker constructor return error if it is enabled by the flag.

This is to move corresponding files out of http://codereview.chromium.org/48106/ so that this can be checked in before the change to enable worker. The reason for doing this is to avoid build break since the already checked-in third_party/WebKit/WebKit/chromium/src/WebKit.cpp  has the ifdef guarded code depend on this.
Review URL: http://codereview.chromium.org/42313

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11952 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 22 insertions, 0 deletions

diff --git a/webkit/port/bindings/v8/V8WorkerCustom.cpp b/webkit/port/bindings/v8/V8WorkerCustom.cpp
index 7426383..1f7e5fe 100644
--- a/webkit/port/bindings/v8/V8WorkerCustom.cpp
+++ b/webkit/port/bindings/v8/V8WorkerCustom.cpp
@@ -42,12 +42,18 @@
 #include "V8HTMLDocument.h"
 #include "V8ObjectEventListener.h"
 #include "Worker.h"
+#include "WorkerContextExecutionProxy.h"
 
 namespace WebCore {
 
 CALLBACK_FUNC_DECL(WorkerConstructor) {
   INC_STATS(L"DOM.Worker.Constructor");
 
+  if (!WorkerContextExecutionProxy::isWebWorkersEnabled()) {
+    V8Proxy::ThrowError(V8Proxy::SYNTAX_ERROR, "Worker is not enabled.");
+    return v8::Undefined();
+  }
+
   if (!args.IsConstructCall()) {
     V8Proxy::ThrowError(V8Proxy::TYPE_ERROR,
         "DOM object constructor cannot be called as a function.");
diff --git a/webkit/port/bindings/v8/WorkerContextExecutionProxy.cpp b/webkit/port/bindings/v8/WorkerContextExecutionProxy.cpp
index c7e200f..a73d828 100644
--- a/webkit/port/bindings/v8/WorkerContextExecutionProxy.cpp
+++ b/webkit/port/bindings/v8/WorkerContextExecutionProxy.cpp
@@ -47,6 +47,18 @@
 
 namespace WebCore {
 
+static bool workerEnabled = false;
+
+bool WorkerContextExecutionProxy::isWebWorkersEnabled()
+{
+    return workerEnabled;
+}
+
+void WorkerContextExecutionProxy::enableWebWorkers(bool value)
+{
+    workerEnabled = true;
+}
+
 WorkerContextExecutionProxy::WorkerContextExecutionProxy(WorkerContext* workerContext)
     : m_workerContext(workerContext)
     , m_recursion(0)
diff --git a/webkit/port/bindings/v8/WorkerContextExecutionProxy.h b/webkit/port/bindings/v8/WorkerContextExecutionProxy.h
index b34f92d..9fb3a0c 100644
--- a/webkit/port/bindings/v8/WorkerContextExecutionProxy.h
+++ b/webkit/port/bindings/v8/WorkerContextExecutionProxy.h
@@ -83,6 +83,10 @@ namespace WebCore {
         static v8::Handle<v8::Value> EventTargetToV8Object(EventTarget* target);
         static v8::Handle<v8::Value> WorkerContextToV8Object(WorkerContext* wc);
 
+        // Enables HTML5 worker support.
+        static void enableWebWorkers(bool);
+        static bool isWebWorkersEnabled();
+
     private:
         void initContextIfNeeded();
         void dispose();