Fixed expando-loss.html test.

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index d0b1507be5a13a82865857ab3516b60d57bd2885..c365bd5508fbca82a6edc34362d6df51211d9d96 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -224,14 +224,14 @@ void HTMLCanvasElement::registerRenderingContextFactory(PassOwnPtr<CanvasRenderi
 
 ScriptValue HTMLCanvasElement::getContext(ScriptState* scriptState, const String& type, const CanvasContextCreationAttributes& attributes)
 {
-    CanvasRenderingContext* context = getCanvasRenderingContext(type, attributes);
+    CanvasRenderingContext* context = getCanvasRenderingContext(scriptState, type, attributes);
     if (!context) {
         return ScriptValue::createNull(scriptState);
     }
     return ScriptValue(scriptState, toV8(context, scriptState->context()->Global(), scriptState->isolate()));
 }
 
-CanvasRenderingContext* HTMLCanvasElement::getCanvasRenderingContext(const String& type, const CanvasContextCreationAttributes& attributes)
+CanvasRenderingContext* HTMLCanvasElement::getCanvasRenderingContext(ScriptState* scriptState, const String& type, const CanvasContextCreationAttributes& attributes)
 {
     CanvasRenderingContext::ContextType contextType = CanvasRenderingContext::contextTypeFromId(type);
 
@@ -260,7 +260,7 @@ CanvasRenderingContext* HTMLCanvasElement::getCanvasRenderingContext(const Strin
         return nullptr;
     }
 
-    m_context = factory->create(this, attributes, document());
+    m_context = factory->create(this, scriptState, attributes, document());
     if (!m_context)
         return nullptr;