Fix frame-exact seeking again to stay within duration as opposed to rounding to the closest frame.

Based on discussion from https://bugs.webkit.org/show_bug.cgi?id=52697 to be consistent with other WebKit ports.

BUG=69499
TEST=media_unittests

Review URL: http://codereview.chromium.org/6259012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72247 0039d316-1c4b-4281-b951-d872f2087c98

media/filters/video_renderer_base.cc

@@ -408,7 +408,7 @@ void VideoRendererBase::ConsumeVideoFrame(scoped_refptr<VideoFrame> frame) {
 
   // Discard frames until we reach our desired seek timestamp.
   if (state_ == kSeeking && !frame->IsEndOfStream() &&
-      (frame->GetTimestamp() + frame->GetDuration() / 2) < seek_timestamp_) {
+      (frame->GetTimestamp() + frame->GetDuration()) <= seek_timestamp_) {
     frames_queue_done_.push_back(frame);
     ScheduleRead_Locked();
   } else {

media/filters/video_renderer_base_unittest.cc

@@ -243,15 +243,15 @@ TEST_F(VideoRendererBaseTest, Seek_Exact) {
   Flush();
 }
 
-TEST_F(VideoRendererBaseTest, Seek_RoundUp) {
+TEST_F(VideoRendererBaseTest, Seek_RightBefore) {
   Initialize();
   Flush();
   Seek(kDuration * 6 - 1);
-  ExpectCurrentTimestamp(kDuration * 6);
+  ExpectCurrentTimestamp(kDuration * 5);
   Flush();
 }
 
-TEST_F(VideoRendererBaseTest, Seek_RoundDown) {
+TEST_F(VideoRendererBaseTest, Seek_RightAfter) {
   Initialize();
   Flush();
   Seek(kDuration * 6 + 1);