[HTML Imports] Let script of imported document running.

Source/core/loader/cache/CachedResourceLoader.cpp

Index: Source/core/loader/cache/CachedResourceLoader.cpp
diff --git a/Source/core/loader/cache/CachedResourceLoader.cpp b/Source/core/loader/cache/CachedResourceLoader.cpp
index 2dd32893ad18c270b28f7f4a5b64dde8331de027..cba13f9a96ec62d2df913291b35237696a6c407c 100644
--- a/Source/core/loader/cache/CachedResourceLoader.cpp
+++ b/Source/core/loader/cache/CachedResourceLoader.cpp
@@ -31,6 +31,7 @@
 #include "core/dom/Document.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLFrameOwnerElement.h"
+#include "core/html/HTMLImport.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
@@ -187,7 +188,14 @@ CachedResource* CachedResourceLoader::cachedResource(const KURL& resourceURL) co
 
 Frame* CachedResourceLoader::frame() const
 {
-    return m_documentLoader ? m_documentLoader->frame() : 0;
+    if (m_documentLoader)
+        return m_documentLoader->frame();
+    if (m_document) {
+        if (HTMLImport* import = m_document->import())
+            return import->frame();
+    }
+
+    return 0;
 }
 
 CachedResourceHandle<CachedImage> CachedResourceLoader::requestImage(CachedResourceRequest& request)
@@ -506,7 +514,7 @@ CachedResourceHandle<CachedResource> CachedResourceLoader::requestResource(Cache
         if (request.options().securityCheck == DoSecurityCheck && (frameLoader->state() == FrameStateProvisional || !frameLoader->activeDocumentLoader() || frameLoader->activeDocumentLoader()->isStopping()))
             return 0;
 
-        if (!m_documentLoader->scheduleArchiveLoad(resource.get(), request.resourceRequest()))
+        if (!m_documentLoader || !m_documentLoader->scheduleArchiveLoad(resource.get(), request.resourceRequest()))
             resource->load(this, request.options());
 
         // We don't support immediate loads, but we do support immediate failure.
@@ -605,7 +613,7 @@ ResourceRequestCachePolicy CachedResourceLoader::resourceRequestCachePolicy(cons
     if (request.isConditional())
         return ReloadIgnoringCacheData;
 
-    if (m_documentLoader->isLoadingInAPISense()) {
+    if (m_documentLoader && m_documentLoader->isLoadingInAPISense()) {
         // For POST requests, we mutate the main resource's cache policy to avoid form resubmission.
         // This policy should not be inherited by subresources.
         ResourceRequestCachePolicy mainResourceCachePolicy = m_documentLoader->request().cachePolicy();