[Net] Propagate priority changes from URLRequest to HttpTransaction

net/http/http_transaction_unittest.h

Index: net/http/http_transaction_unittest.h
diff --git a/net/http/http_transaction_unittest.h b/net/http/http_transaction_unittest.h
index 693b72089be4c4b695423725b71035eb5c692cb1..844e7f4d4a3f2e862a9cd58975167a70add879aa 100644
--- a/net/http/http_transaction_unittest.h
+++ b/net/http/http_transaction_unittest.h
@@ -192,6 +192,10 @@ class MockNetworkTransaction : public net::HttpTransaction {
   virtual bool GetLoadTimingInfo(
       net::LoadTimingInfo* load_timing_info) const OVERRIDE;
 
+  virtual void SetPriority(net::RequestPriority priority) OVERRIDE;
+
+  net::RequestPriority priority() const { return priority_; }
+
  private:
   void CallbackLater(const net::CompletionCallback& callback, int result);
   void RunCallback(const net::CompletionCallback& callback, int result);
@@ -201,6 +205,7 @@ class MockNetworkTransaction : public net::HttpTransaction {
   std::string data_;
   int data_cursor_;
   int test_mode_;
+  net::RequestPriority priority_;
   base::WeakPtr<MockNetworkLayer> transaction_factory_;
 };
 
@@ -214,6 +219,19 @@ class MockNetworkLayer : public net::HttpTransactionFactory,
   bool done_reading_called() const { return done_reading_called_; }
   void TransactionDoneReading();
 
+  // Returns the last transaction created by CreateTransaction, or
+  // NULL if one has not been created yet. It is the caller's
+  // responsibility to make sure that that transaction is still valid.
+  MockNetworkTransaction* last_transaction() {
+    return last_transaction_;
+  }
+
+  // Makes last_transaction() return NULL until the next transaction
+  // is created.
+  void ClearLastTransaction() {
+    last_transaction_ = NULL;
+  }
+
   // net::HttpTransactionFactory:
   virtual int CreateTransaction(
       net::RequestPriority priority,
@@ -225,6 +243,7 @@ class MockNetworkLayer : public net::HttpTransactionFactory,
  private:
   int transaction_count_;
   bool done_reading_called_;
+  MockNetworkTransaction* last_transaction_;
 };
 
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