Make DataUseTabModel and DataUseMatcher more independent

chrome/browser/android/data_usage/tab_data_use_entry_unittest.cc

Index: chrome/browser/android/data_usage/tab_data_use_entry_unittest.cc
diff --git a/chrome/browser/android/data_usage/tab_data_use_entry_unittest.cc b/chrome/browser/android/data_usage/tab_data_use_entry_unittest.cc
index b81f726ffe4f0a633469630e597d2a1e0c63ba18..9eb73f74624be61a222277b9282a16cd7b13e437 100644
--- a/chrome/browser/android/data_usage/tab_data_use_entry_unittest.cc
+++ b/chrome/browser/android/data_usage/tab_data_use_entry_unittest.cc
@@ -10,6 +10,7 @@
 #include <memory>
 #include <string>
 
+#include "base/bind.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/histogram_tester.h"
@@ -21,9 +22,9 @@
 namespace {
 
 // Tracking labels for tests.
-const std::string kTestLabel1 = "label_1";
-const std::string kTestLabel2 = "label_2";
-const std::string kTestLabel3 = "label_3";
+const char kTestLabel1[] = "label_1";
+const char kTestLabel2[] = "label_2";
+const char kTestLabel3[] = "label_3";
 
 enum TabEntrySessionSize { ZERO = 0, ONE, TWO, THREE };
 
@@ -67,12 +68,20 @@ class SimpleOffsetTestTickClock : public base::TickClock {
 class TabDataUseEntryTest : public testing::Test {
  public:
   TabDataUseEntryTest() {
-    tab_model_.reset(new DataUseTabModel());
+    tab_model_.reset(new DataUseTabModel(
+        base::Bind(&TabDataUseEntryTest::FetchMatchingRules,
+                   base::Unretained(this)),
+        base::Bind(&TabDataUseEntryTest::OnMatchingRulesFetched,
+                   base::Unretained(this))));
     tick_clock_ = new SimpleOffsetTestTickClock();
     tab_model_->tick_clock_.reset(tick_clock_);
     tab_entry_.reset(new TabDataUseEntry(tab_model_.get()));
   }
 
+  void FetchMatchingRules() {}
+
+  void OnMatchingRulesFetched(bool is_valid) {}
+
   size_t GetMaxSessionsPerTab() const {
     return tab_model_->max_sessions_per_tab();
   }