Start hooking up "element.requestFullscreen()" in chrome for android.

chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc

Index: chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
diff --git a/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc b/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
index af997c4120abd0f746980df0709e99d9e107b4b1..b0dc6ae13c67b0c6c156f6039a58735d18ad7b47 100644
--- a/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
+++ b/chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc
@@ -280,6 +280,27 @@ void WebContentsDelegateAndroid::ShowRepostFormWarningDialog(
       content_view_core.obj());
 }
 
+void WebContentsDelegateAndroid::ToggleFullscreenModeForTab(
+    WebContents* web_contents,
+    bool enter_fullscreen) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = GetJavaDelegate(env);
+  if (obj.is_null())
+    return;
+  Java_WebContentsDelegateAndroid_toggleFullscreenModeForTab(
+      env, obj.obj(), enter_fullscreen);
+}
+
+bool WebContentsDelegateAndroid::IsFullscreenForTabOrPending(
+    const WebContents* web_contents) const {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = GetJavaDelegate(env);
+  if (obj.is_null())
+    return false;
+  return Java_WebContentsDelegateAndroid_isFullscreenForTabOrPending(
+      env, obj.obj());
+}
+
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------