Set RequestContextObject for PNaCl pexe fetches, to fix On-Demand update.

chrome/test/nacl/pnacl_header_test.h

Index: chrome/test/nacl/pnacl_header_test.h
diff --git a/chrome/test/nacl/pnacl_header_test.h b/chrome/test/nacl/pnacl_header_test.h
index 9134925edd0874bff5f986ec7836dab25b9122db..6c75fdce00f27b4f5fac1906b8d7a3d40b065a04 100644
--- a/chrome/test/nacl/pnacl_header_test.h
+++ b/chrome/test/nacl/pnacl_header_test.h
@@ -8,6 +8,8 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/test/base/in_process_browser_test.h"
+#include "content/public/browser/resource_dispatcher_host_delegate.h"
+#include "content/public/common/resource_type.h"
 
 namespace base {
 class FilePath;
@@ -20,6 +22,30 @@ class HttpResponse;
 }
 }
 
+using content::ResourceDispatcherHostDelegate;
+
+class TestDispatcherHostDelegate : public ResourceDispatcherHostDelegate {
+ public:
+  explicit TestDispatcherHostDelegate()
+      : ResourceDispatcherHostDelegate(), found_pnacl_header_(false) {}
+
+  virtual ~TestDispatcherHostDelegate() {}
+
+  virtual void RequestBeginning(
+      net::URLRequest* request,
+      content::ResourceContext* resource_context,
+      content::AppCacheService* appcache_service,
+      content::ResourceType resource_type,
+      ScopedVector<content::ResourceThrottle>* throttles) OVERRIDE;
+
+  bool found_pnacl_header() const { return found_pnacl_header_; }
+
+ private:
+  bool found_pnacl_header_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestDispatcherHostDelegate);
+};
+
 class PnaclHeaderTest : public InProcessBrowserTest {
  public:
   PnaclHeaderTest();
@@ -40,6 +66,7 @@ class PnaclHeaderTest : public InProcessBrowserTest {
 
   int noncors_loads_;
   int cors_loads_;
+  TestDispatcherHostDelegate test_delegate_;
   DISALLOW_COPY_AND_ASSIGN(PnaclHeaderTest);
 };