update_engine: Relocate inference and storage of P2P related properties.

This change moves the inference of P2P related properties from
OmahaRequestAction to OmahaResponseHandlerAction, and their storage from
OmahaRequestParams to PayloadState. This is needed in order for the
UpdateCanStart policy to be able to decide P2P properties, which only
happens after the Omaha response is received and processed, and prior to
applying the update.  Further, P2P properties do not affect the Omaha
request, and so there's no reason for them to reside in
OmahaRequestParams nor decided as early as OmahaRequestAction.

Additional cleanup includes swapping expected/actual arguments to EXPECT
macros where appropriate, and removing redundant .Times(1) expectation
qualifiers.

BUG=chromium:384087
TEST=Unit tests.

Change-Id: I6d5b4b44745d5dab7e350bdf019dbf804bf196a1
Reviewed-on: https://chromium-review.googlesource.com/223618
Reviewed-by: Gilad Arnold <garnold@chromium.org>
Commit-Queue: Gilad Arnold <garnold@chromium.org>
Tested-by: Gilad Arnold <garnold@chromium.org>
diff --git a/omaha_request_action_unittest.cc b/omaha_request_action_unittest.cc
index 775f074..4adf998 100644
--- a/omaha_request_action_unittest.cc
+++ b/omaha_request_action_unittest.cc
@@ -19,6 +19,7 @@
 #include "update_engine/fake_prefs.h"
 #include "update_engine/mock_connection_manager.h"
 #include "update_engine/mock_http_fetcher.h"
+#include "update_engine/mock_payload_state.h"
 #include "update_engine/omaha_hash_calculator.h"
 #include "update_engine/omaha_request_action.h"
 #include "update_engine/omaha_request_params.h"
@@ -37,6 +38,8 @@
 using testing::Le;
 using testing::NiceMock;
 using testing::Return;
+using testing::ReturnPointee;
+using testing::SaveArg;
 using testing::SetArgumentPointee;
 using testing::_;
 
@@ -116,9 +119,7 @@
       false,   // delta okay
       false,   // interactive
       "http://url",
-      "",      // target_version_prefix
-      false,   // use_p2p_for_downloading
-      false};  // use_p2p_for_sharing
+      ""};     // target_version_prefix
 
   FakePrefs fake_prefs_;
 };
@@ -1049,9 +1050,7 @@
                             false,   // delta okay
                             false,   // interactive
                             "http://url",
-                            "",      // target_version_prefix
-                            false,   // use_p2p_for_downloading
-                            false);  // use_p2p_for_sharing
+                            "");     // target_version_prefix
   OmahaResponse response;
   ASSERT_FALSE(
       TestUpdateCheck(&params,
@@ -1247,9 +1246,7 @@
                               delta_okay,
                               false,  // interactive
                               "http://url",
-                              "",     // target_version_prefix
-                              false,  // use_p2p_for_downloading
-                              false);  // use_p2p_for_sharing
+                              "");    // target_version_prefix
     ASSERT_FALSE(TestUpdateCheck(&params,
                                  "invalid xml>",
                                  -1,
@@ -1290,9 +1287,7 @@
                               true,   // delta_okay
                               interactive,
                               "http://url",
-                              "",     // target_version_prefix
-                              false,  // use_p2p_for_downloading
-                              false);  // use_p2p_for_sharing
+                              "");    // target_version_prefix
     ASSERT_FALSE(TestUpdateCheck(&params,
                                  "invalid xml>",
                                  -1,
@@ -1924,13 +1919,25 @@
     const string& expected_p2p_url) {
   OmahaResponse response;
   OmahaRequestParams request_params = request_params_;
-  request_params.set_use_p2p_for_downloading(initial_allow_p2p_for_downloading);
-  request_params.set_use_p2p_for_sharing(initial_allow_p2p_for_sharing);
+  bool actual_allow_p2p_for_downloading = initial_allow_p2p_for_downloading;
+  bool actual_allow_p2p_for_sharing = initial_allow_p2p_for_sharing;
+  string actual_p2p_url;
 
   MockPayloadState mock_payload_state;
   fake_system_state_.set_payload_state(&mock_payload_state);
   EXPECT_CALL(mock_payload_state, P2PAttemptAllowed())
       .WillRepeatedly(Return(payload_state_allow_p2p_attempt));
+  EXPECT_CALL(mock_payload_state, GetUsingP2PForDownloading())
+      .WillRepeatedly(ReturnPointee(&actual_allow_p2p_for_downloading));
+  EXPECT_CALL(mock_payload_state, GetUsingP2PForSharing())
+      .WillRepeatedly(ReturnPointee(&actual_allow_p2p_for_sharing));
+  EXPECT_CALL(mock_payload_state, SetUsingP2PForDownloading(_))
+      .WillRepeatedly(SaveArg<0>(&actual_allow_p2p_for_downloading));
+  EXPECT_CALL(mock_payload_state, SetUsingP2PForSharing(_))
+      .WillRepeatedly(SaveArg<0>(&actual_allow_p2p_for_sharing));
+  EXPECT_CALL(mock_payload_state, SetP2PUrl(_))
+      .WillRepeatedly(SaveArg<0>(&actual_p2p_url));
+
   MockP2PManager mock_p2p_manager;
   fake_system_state_.set_p2p_manager(&mock_p2p_manager);
   mock_p2p_manager.fake().SetLookupUrlForFileResult(p2p_client_result_url);
@@ -1965,18 +1972,15 @@
                       nullptr));
   EXPECT_TRUE(response.update_exists);
 
-  EXPECT_EQ(response.disable_p2p_for_downloading,
-            omaha_disable_p2p_for_downloading);
-  EXPECT_EQ(response.disable_p2p_for_sharing,
-            omaha_disable_p2p_for_sharing);
+  EXPECT_EQ(omaha_disable_p2p_for_downloading,
+            response.disable_p2p_for_downloading);
+  EXPECT_EQ(omaha_disable_p2p_for_sharing,
+            response.disable_p2p_for_sharing);
 
-  EXPECT_EQ(request_params.use_p2p_for_downloading(),
-            expected_allow_p2p_for_downloading);
-
-  EXPECT_EQ(request_params.use_p2p_for_sharing(),
-            expected_allow_p2p_for_sharing);
-
-  EXPECT_EQ(request_params.p2p_url(), expected_p2p_url);
+  EXPECT_EQ(expected_allow_p2p_for_downloading,
+            actual_allow_p2p_for_downloading);
+  EXPECT_EQ(expected_allow_p2p_for_sharing, actual_allow_p2p_for_sharing);
+  EXPECT_EQ(expected_p2p_url, actual_p2p_url);
 }
 
 TEST_F(OmahaRequestActionTest, P2PWithPeer) {