Implement apps v2 custom window frame.

remoting/webapp/html/window_frame.html

Index: remoting/webapp/html/window_frame.html
diff --git a/remoting/webapp/html/window_frame.html b/remoting/webapp/html/window_frame.html
new file mode 100644
index 0000000000000000000000000000000000000000..9f42197ab54f1413ba64ddf37de46fa03066879a
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+++ b/remoting/webapp/html/window_frame.html
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+<!--
+Copyright (c) 2014 The Chromium Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
+-->
+<div id="title-bar" class="title-bar apps-v2-only">
+  <span class="window-title">&nbsp;</span>
+  <span class="window-controls-hover-target">
+    <div class="window-controls">
+      <span i18n-title="DISCONNECT_MYSELF_BUTTON"
+            class="window-control window-disconnect">
+        <img src="icon_disconnect.webp">
+      </span>
+      <span i18n-title="MINIMIZE_WINDOW"
+            class="window-control window-minimize">
+        <img src="icon_minimize.webp">
+      </span>
+      <span i18n-title="MAXIMIZE_WINDOW"
+            class="window-control window-maximize-restore">
+        <img src="icon_maximize_restore.webp">
+      </span>
+      <span i18n-title="CLOSE_WINDOW"
+            class="window-control window-close">
+        <img src="icon_close.webp">
+      </span>
+    </div>
+    <div class="window-controls-stub">&nbsp;</div>
+  </span>
+</div>