Add the JNI code in order to let Java use the InterestsFetcher.

chrome/browser/interests/interests_fetcher_unittest.cc

Index: chrome/browser/interests/interests_fetcher_unittest.cc
diff --git a/chrome/browser/interests/interests_fetcher_unittest.cc b/chrome/browser/interests/interests_fetcher_unittest.cc
index 8449d15deaa87e355d4505dff62627be7347383b..7e71f9691b1276997e86a9c69503b9e57bef6e5e 100644
--- a/chrome/browser/interests/interests_fetcher_unittest.cc
+++ b/chrome/browser/interests/interests_fetcher_unittest.cc
@@ -78,9 +78,22 @@ class InterestsFetcherTest : public testing::Test {
     command_line->AppendSwitchASCII(switches::kInterestsURL, kInterestsURL);
   }
 
-  MOCK_METHOD1(OnReceivedInterests,
-               void(const std::vector<InterestsFetcher::Interest>&));
-
+  MOCK_METHOD0(OnSuccessfulResponse, void());
+  MOCK_METHOD0(OnEmptyResponse, void());
+  MOCK_METHOD0(OnFailedResponse, void());
+
+  void OnReceivedInterests(
+      scoped_ptr<std::vector<InterestsFetcher::Interest>> interests) {
+
+    if (interests) {

[Bernhard Bauer, 2015/10/08 09:04:41]

Early-return if (!interests)?

[PEConn, 2015/10/08 09:40:56]

Done.

+      if (*interests == GetExpectedEmptyResponse())
+        OnEmptyResponse();
+      else if (*interests == GetExpectedSuccessfulResponse())
+        OnSuccessfulResponse();

[Bernhard Bauer, 2015/10/08 09:04:41]

Add an additional else that fails the test, in case a different response is
received?

[PEConn, 2015/10/08 09:40:56]

Done.

+    } else {
+      OnFailedResponse();
+    }
+  }
  protected:
   void RequestInterests() {
     request_.reset(new InterestsFetcher(&token_service_,
@@ -140,39 +153,39 @@ class InterestsFetcherTest : public testing::Test {
 
 TEST_F(InterestsFetcherTest, EmptyResponse) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnEmptyResponse());
   IssueAccessTokens();
   SendValidResponse(kEmptyResponse);
 }
 
 TEST_F(InterestsFetcherTest, SuccessfullResponse) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedSuccessfulResponse()));
+  EXPECT_CALL(*this, OnSuccessfulResponse());
   IssueAccessTokens();
   SendValidResponse(kSuccessfulResponse);
 }
 
 TEST_F(InterestsFetcherTest, FailedResponse) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnFailedResponse());
   IssueAccessTokens();
   SendFailedResponse();
 }
 
 TEST_F(InterestsFetcherTest, FailedOAuthRequest) {
   RequestInterests();
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnFailedResponse());
   IssueAccessTokenErrors();
 }
 
 TEST_F(InterestsFetcherTest, RetryOnAuthorizationError) {
   RequestInterests();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse())).Times(0);
+  EXPECT_CALL(*this, OnEmptyResponse()).Times(0);
   IssueAccessTokens();
   SendAuthorizationError();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnEmptyResponse());
   IssueAccessTokens();
   SendValidResponse(kEmptyResponse);
 }
@@ -180,11 +193,11 @@ TEST_F(InterestsFetcherTest, RetryOnAuthorizationError) {
 TEST_F(InterestsFetcherTest, RetryOnlyOnceOnAuthorizationError) {
   RequestInterests();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse())).Times(0);
+  EXPECT_CALL(*this, OnEmptyResponse()).Times(0);
   IssueAccessTokens();
   SendAuthorizationError();
 
-  EXPECT_CALL(*this, OnReceivedInterests(GetExpectedEmptyResponse()));
+  EXPECT_CALL(*this, OnFailedResponse());
   IssueAccessTokens();
   SendAuthorizationError();
 }