Remove temporary hack necessary while webkit change was landing.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

 // Copyright (c) 2011 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.
 
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 723 matching lines @@
   if (!clip.IsEmpty())
     new_clip = clip;
 
   // Don't notify the plugin if we've already sent these same params before.
   if (sent_did_change_view_ && position == position_ && new_clip == clip_)
     return;
 
   if (desired_fullscreen_state_ || fullscreen_) {
     WebElement element = container_->element();
     WebDocument document = element.document();
-    // TODO(polina): temporary hack to ease WebKit/Chromium commit sequence.
-#ifdef WEBKIT_WEBDOCUMENT_HAS_FULLSCREENELEMENT
     bool is_fullscreen_element = (element == document.fullScreenElement());
-#else
-    bool is_fullscreen_element = desired_fullscreen_state_;
-#endif
     if (!fullscreen_ && desired_fullscreen_state_ &&
         delegate()->IsInFullscreenMode() && is_fullscreen_element) {
       // Entered fullscreen. Only possible via SetFullscreen().
       fullscreen_ = true;
     } else if (fullscreen_ && !is_fullscreen_element) {
       // Exited fullscreen. Possible via SetFullscreen() or F11/link,
       // so desired_fullscreen_state might be out-of-date.
       desired_fullscreen_state_ = false;
       fullscreen_ = false;
       // Reset the size attributes that we hacked to fill in the screen and
@@ skipping 1282 matching lines @@
   screen_size_for_fullscreen_ = gfx::Size();
   WebElement element = container_->element();
   element.setAttribute(WebString::fromUTF8(kWidth), width_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kHeight), height_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kBorder), border_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kStyle), style_before_fullscreen_);
 }
 
 }  // namespace ppapi
 }  // namespace webkit