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 48ec7094c28e43d7dee482b96a00a0a776209e43..7f42aa1e4366ce0a2f2f87f2ab84769bd0ff2310 100644
--- a/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
@@ -57,6 +57,10 @@ static const int kMediaSliderThumbPaintHeight = 12;
 static const int kMediaOverlayPlayButtonWidth = 48;
 static const int kMediaOverlayPlayButtonHeight = 48;
 
+// Overlay media remoting cast button size.
+static const int kMediaRemotingCastIconWidth = 44;
+static const int kMediaRemotingCastIconHeight = 36;
+
 // Alpha for disabled elements.
 static const float kDisabledAlpha = 0.4;
 
@@ -217,6 +221,28 @@ static void PaintRoundedSliderBackground(const IntRect& rect,
                           slider_background_color);
 }
 
+bool MediaControlsPainter::PaintMediaRemotingCastIcon(
+    const LayoutObject& object,
+    const PaintInfo& paintInfo,
+    const IntRect& rect) {
+  const HTMLMediaElement* media_element = ToParentMediaElement(object);
+  if (!media_element)
+    return false;
+
+  static Image* cast_icon = PlatformResource("mediaremotingCast");
+
+  const int button_width = std::min(rect.Width(), kMediaRemotingCastIconWidth);

[liberato (no reviews please), 2017/04/12 21:57:44]

what size box do you see here?  from the css, it looks like it's just the icon
size.  in that case, you might just be able to call PaintMediaButton, and not
memorize the desired size in kMediaRemotingCastIcon*.

the overlay button is 100%, which is why it needs to do extra math.

[xjz, 2017/04/13 00:08:48]

Done.

+  const int button_height =
+      std::min(rect.Height(), kMediaRemotingCastIconHeight);
+
+  return PaintMediaButton(
+      paintInfo.context,
+      IntRect(rect.X() + (rect.Width() - button_width) / 2,
+              rect.Y() + (rect.Height() - button_height) / 2, button_width,
+              button_height),
+      cast_icon);
+}
+
 static void PaintSliderRangeHighlight(const IntRect& rect,
                                       const ComputedStyle& style,
                                       GraphicsContext& context,