Fix progress reporting for multibuffers to report progress for every byte we receive.

media/blink/multibuffer_data_source_unittest.cc

Index: media/blink/multibuffer_data_source_unittest.cc
diff --git a/media/blink/multibuffer_data_source_unittest.cc b/media/blink/multibuffer_data_source_unittest.cc
index 85794b75ea5e43e716bb2c549258dc451436d8c4..f265046163ba688773acbf7e17bc19254084233f 100644
--- a/media/blink/multibuffer_data_source_unittest.cc
+++ b/media/blink/multibuffer_data_source_unittest.cc
@@ -973,8 +973,10 @@ TEST_F(MultibufferDataSourceTest, Http_Read) {
 
   ReadAt(kDataSize, kDataSize);
   EXPECT_CALL(*this, ReadCallback(kDataSize));
-  EXPECT_CALL(host_, AddBufferedByteRange(0, kDataSize * 2));
+  EXPECT_CALL(host_,
+              AddBufferedByteRange(kDataSize, kDataSize + kDataSize / 2));
   ReceiveData(kDataSize / 2);
+  EXPECT_CALL(host_, AddBufferedByteRange(0, kDataSize * 2));
   ReceiveData(kDataSize / 2);
 
   EXPECT_TRUE(data_source_->downloading());
@@ -989,8 +991,10 @@ TEST_F(MultibufferDataSourceTest, Http_ShareData) {
 
   ReadAt(kDataSize, kDataSize);
   EXPECT_CALL(*this, ReadCallback(kDataSize));
-  EXPECT_CALL(host_, AddBufferedByteRange(0, kDataSize * 2));
+  EXPECT_CALL(host_,
+              AddBufferedByteRange(kDataSize, kDataSize + kDataSize / 2));
   ReceiveData(kDataSize / 2);
+  EXPECT_CALL(host_, AddBufferedByteRange(0, kDataSize * 2));
   ReceiveData(kDataSize / 2);
 
   EXPECT_TRUE(data_source_->downloading());
@@ -1313,6 +1317,7 @@ TEST_F(MultibufferDataSourceTest, SeekPastEOF) {
   EXPECT_CALL(*this, ReadCallback(kDataSize));
   ReadAt(0);
 
+  EXPECT_CALL(host_, AddBufferedByteRange(kDataSize, kDataSize + 1));
   ReceiveData(1);
   EXPECT_CALL(host_, AddBufferedByteRange(0, kDataSize * 3));
   FinishLoading();