Fix subpixel accumulation for composited content layers

third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.cpp

Index: third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.cpp b/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.cpp
index 0ec64a427a78aa8ad385bae147f9408a644ac975..1d459084ac90ace8a6569d6ed531774786f4fe22 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.cpp
@@ -59,12 +59,9 @@ bool LayoutTextTrackContainer::updateSizes(const LayoutVideo& videoLayoutObject)
     // for lack of per-spec vh/vw support) but the whole media element is used
     // for cue rendering. This is inconsistent. See also the somewhat related
     // spec bug: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28105
-    IntSize videoSize = videoLayoutObject.videoBox().size();

[chrishtr, 2016/07/21 18:02:31]

Why the changes here? videoBox() has integer size.

-    if (m_videoSize == videoSize)
-        return false;
-    m_videoSize = videoSize;
+    LayoutSize videoSize = videoLayoutObject.videoBox().size();
 
-    float smallestDimension = std::min(m_videoSize.height(), m_videoSize.width());
+    float smallestDimension = std::min(videoSize.height(), videoSize.width()).toFloat();
 
     float fontSize = smallestDimension * 0.05f;
     if (m_fontSize == fontSize)