Cherry-pick: Hide fullscreen button when fullscreen not supported.

NOTE: this cherry-pick will only be landed after
https://googleplex-android-review.git.corp.google.com/#/c/523938/

BUG=400333

Review URL: https://codereview.chromium.org/442603006

git-svn-id: svn://svn.chromium.org/blink/trunk@179633 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Conflicts:
	LayoutTests/media/video-controls-fullscreen.js

Change-Id: I806815e693f10703eea832ed030579775ecd0f2e
diff --git a/LayoutTests/media/video-controls-fullscreen-not-supported.html b/LayoutTests/media/video-controls-fullscreen-not-supported.html
new file mode 100644
index 0000000..9b2fbb2
--- /dev/null
+++ b/LayoutTests/media/video-controls-fullscreen-not-supported.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>video controls fullscreen button</title>
+        <script src="../resources/testharness.js"></script>
+        <script src="../resources/testharnessreport.js"></script>
+        <script src="media-file.js"></script>
+        <script src="media-controls.js"></script>
+        <script src="video-controls-fullscreen.js"></script>
+    </head>
+    <body>
+        <div id="log"></div>
+        <script>
+            window.internals.settings.setFullscreenSupported(false);
+            fullscreen_not_supported_test();
+        </script>
+    </body>
+</html>
diff --git a/Source/core/html/shadow/MediaControls.cpp b/Source/core/html/shadow/MediaControls.cpp
index a82cf61..011e9b8 100644
--- a/Source/core/html/shadow/MediaControls.cpp
+++ b/Source/core/html/shadow/MediaControls.cpp
@@ -40,6 +40,11 @@
 // LayoutTests/media/media-controls.js.
 static const double timeWithoutMouseMovementBeforeHidingMediaControls = 3;
 
+static bool fullscreenIsSupported(const Document& document)
+{
+    return !document.settings() || document.settings()->fullscreenSupported();
+}
+
 MediaControls::MediaControls(HTMLMediaElement& mediaElement)
     : HTMLDivElement(mediaElement.document())
     , m_mediaElement(&mediaElement)
@@ -178,7 +183,7 @@
 
     refreshClosedCaptionsButtonVisibility();
 
-    if (mediaElement().hasVideo())
+    if (mediaElement().hasVideo() && fullscreenIsSupported(document()))
         m_fullScreenButton->show();
     else
         m_fullScreenButton->hide();