Paint media element's play button using padding.

third_party/WebKit/Source/core/css/mediaControlsAndroidNew.css

Index: third_party/WebKit/Source/core/css/mediaControlsAndroidNew.css
diff --git a/third_party/WebKit/Source/core/css/mediaControlsAndroidNew.css b/third_party/WebKit/Source/core/css/mediaControlsAndroidNew.css
index 4e79212229bbabe580ee2208c290e6e0edec920e..ac90d613859a08be0ac13c9c10d83e26de6db1c8 100644
--- a/third_party/WebKit/Source/core/css/mediaControlsAndroidNew.css
+++ b/third_party/WebKit/Source/core/css/mediaControlsAndroidNew.css
@@ -26,3 +26,70 @@
 
 /* WARNING: This css file can only style <audio> and <video> elements */
 
+audio {
+    height: 48px;
+}
+
+audio::-webkit-media-controls-enclosure, video::-webkit-media-controls-enclosure {
+    height: 48px;
+}
+
+audio::-webkit-media-controls-panel, video::-webkit-media-controls-panel {
+    height: 48px;
+    min-width: 48px;
+    font-size: 14px;
+}
+
+audio::-webkit-media-controls-mute-button, video::-webkit-media-controls-mute-button {
+    width: 48px;
+    height: 48px;
+    padding: 8px;
+    line-height: 48px;

[philipj_slow, 2016/03/21 11:49:30]

Hmm, why is line-height needed everywhere?

[liberato (no reviews please), 2016/03/21 14:33:33]

i doubt that it is, but it was present before in mediaControlsNew.css .  keeping
it makes it clearer that there's no unintended functionality change.

i'll try without, but it's unclear to me that one should change it here.

[philipj_slow, 2016/03/21 14:44:40]

Ah, I see, you've just preserved what was already there. Cleanup of useless bits
are appreciated, but whether it's done before/after this CL or not at all, I'll
not hold this CL hostage :)

[liberato (no reviews please), 2016/03/22 14:25:12]

consolidated into the panel.  better than where it is, relatively safe change,
and didn't seem to break the panel or captions.

+}
+
+video::-internal-media-controls-overlay-cast-button {
+    width: 48px;
+    height: 48px;
+}
+
+audio::-webkit-media-controls-play-button, video::-webkit-media-controls-play-button {
+    width: 48px;
+    height: 48px;
+    padding: 8px;
+    line-height: 48px;
+}
+
+audio::-webkit-media-controls-timeline-container, video::-webkit-media-controls-timeline-container {
+    height: 48px;
+}
+
+audio::-webkit-media-controls-current-time-display, video::-webkit-media-controls-current-time-display {
+    height: 48px;
+    line-height: 48px;
+}
+
+audio::-webkit-media-controls-time-remaining-display, video::-webkit-media-controls-time-remaining-display {
+    height: 48px;
+    line-height: 48px;
+}
+
+audio::-webkit-media-controls-fullscreen-button, video::-webkit-media-controls-fullscreen-button {
+    width: 48px;
+    height: 48px;
+    padding: 8px;
+    line-height: 48px;
+}
+
+audio::-internal-media-controls-cast-button, video::-internal-media-controls-cast-button {
+    width: 48px;
+    height: 48px;
+    padding: 8px;
+    line-height: 48px;
+}
+
+video::-webkit-media-controls-toggle-closed-captions-button {
+    width: 48px;
+    height: 48px;
+    padding: 8px;
+    line-height: 48px;
+}