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 91b18fa41c64fa36459978b185e0fe8f0686e306..2e4b45275be9758c2e6acee0887d3da36988cf66 100644
--- a/media/blink/multibuffer_data_source_unittest.cc
+++ b/media/blink/multibuffer_data_source_unittest.cc
@@ -939,8 +939,10 @@ 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());
@@ -955,8 +957,10 @@ 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());
@@ -1279,6 +1283,7 @@ 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();