Implement lossy pref behavior for JsonPrefStore.

base/files/important_file_writer_unittest.cc

Index: base/files/important_file_writer_unittest.cc
diff --git a/base/files/important_file_writer_unittest.cc b/base/files/important_file_writer_unittest.cc
index d376cdc35ab33cd2491bb69c114f4981ad3eabf1..aef9d1c2a1473afe06ae4927308882aad5da53f7 100644
--- a/base/files/important_file_writer_unittest.cc
+++ b/base/files/important_file_writer_unittest.cc
@@ -99,7 +99,7 @@ class ImportantFileWriterTest : public testing::Test {
 };
 
 TEST_F(ImportantFileWriterTest, Basic) {
-  ImportantFileWriter writer(file_, ThreadTaskRunnerHandle::Get());
+  ImportantFileWriterImpl writer(file_, ThreadTaskRunnerHandle::Get());
   EXPECT_FALSE(PathExists(writer.path()));
   EXPECT_FALSE(successful_write_observer_.GetAndResetObservationState());
   writer.WriteNow(make_scoped_ptr(new std::string("foo")));
@@ -111,7 +111,7 @@ TEST_F(ImportantFileWriterTest, Basic) {
 }
 
 TEST_F(ImportantFileWriterTest, BasicWithSuccessfulWriteObserver) {
-  ImportantFileWriter writer(file_, ThreadTaskRunnerHandle::Get());
+  ImportantFileWriterImpl writer(file_, ThreadTaskRunnerHandle::Get());
   EXPECT_FALSE(PathExists(writer.path()));
   EXPECT_FALSE(successful_write_observer_.GetAndResetObservationState());
   successful_write_observer_.ObserveNextSuccessfulWrite(&writer);
@@ -145,7 +145,7 @@ TEST_F(ImportantFileWriterTest, BasicWithSuccessfulWriteObserver) {
 }
 
 TEST_F(ImportantFileWriterTest, ScheduleWrite) {
-  ImportantFileWriter writer(file_, ThreadTaskRunnerHandle::Get());
+  ImportantFileWriterImpl writer(file_, ThreadTaskRunnerHandle::Get());
   writer.set_commit_interval(TimeDelta::FromMilliseconds(25));
   EXPECT_FALSE(writer.HasPendingWrite());
   DataSerializer serializer("foo");
@@ -161,7 +161,7 @@ TEST_F(ImportantFileWriterTest, ScheduleWrite) {
 }
 
 TEST_F(ImportantFileWriterTest, DoScheduledWrite) {
-  ImportantFileWriter writer(file_, ThreadTaskRunnerHandle::Get());
+  ImportantFileWriterImpl writer(file_, ThreadTaskRunnerHandle::Get());
   EXPECT_FALSE(writer.HasPendingWrite());
   DataSerializer serializer("foo");
   writer.ScheduleWrite(&serializer);
@@ -177,7 +177,7 @@ TEST_F(ImportantFileWriterTest, DoScheduledWrite) {
 }
 
 TEST_F(ImportantFileWriterTest, BatchingWrites) {
-  ImportantFileWriter writer(file_, ThreadTaskRunnerHandle::Get());
+  ImportantFileWriterImpl writer(file_, ThreadTaskRunnerHandle::Get());
   writer.set_commit_interval(TimeDelta::FromMilliseconds(25));
   DataSerializer foo("foo"), bar("bar"), baz("baz");
   writer.ScheduleWrite(&foo);