Media Remoting: Add interstitial elements to media element shadow dom.

third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp

Index: third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp b/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
index 5d69ffe655861f1781dc423559320c34026f807f..3e756a1bd0844f35f9b5f303e53bd32b3b52b81d 100644
--- a/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
@@ -56,6 +56,10 @@ static const int mediaSliderThumbPaintHeight = 12;
 static const int mediaOverlayPlayButtonWidth = 48;
 static const int mediaOverlayPlayButtonHeight = 48;
 
+// Overlay media remoting cast button size.
+static const int MediaRemotingCastIconWidth = 88;
+static const int MediaRemotingCastIconHeight = 72;
+
 // Alpha for disabled elements.
 static const float kDisabledAlpha = 0.4;
 
@@ -203,6 +207,26 @@ bool MediaControlsPainter::paintMediaOverlayPlayButton(
   return paintMediaButton(paintInfo.context, buttonRect, mediaOverlayPlay);
 }
 
+bool MediaControlsPainter::paintMediaRemotingCastIcon(
+    const LayoutObject& object,
+    const PaintInfo& paintInfo,
+    const IntRect& rect) {
+  const HTMLMediaElement* mediaElement = toParentMediaElement(object);
+  if (!mediaElement)
+    return false;
+
+  static Image* mediaremotingCast = platformResource("mediaremotingCast");
+
+  const int buttonWidth = std::min(rect.width(), MediaRemotingCastIconWidth);
+  const int buttonHeight = std::min(rect.height(), MediaRemotingCastIconHeight);
+
+  return paintMediaButton(
+      paintInfo.context,
+      IntRect(rect.center().x() - buttonWidth / 2,

[miu, 2017/04/03 21:44:41]

Looks like there's a potential "one pixel off" result in these calculations for
certain inputs, due to the integer math. I think this should be:

  IntRect(rect.x() + (rect.width() - buttonWidth) / 2,
          rect.y() + (rect.height() - buttonHeight) / 2,
          ...)

[xjz, 2017/04/03 23:39:51]

Done.

+              rect.center().y() - buttonHeight / 2, buttonWidth, buttonHeight),
+      mediaremotingCast);
+}
+
 static void paintRoundedSliderBackground(const IntRect& rect,
                                          const ComputedStyle& style,
                                          GraphicsContext& context,