Makes PlatformEventSource creation in Env conditional

content/browser/web_contents/web_contents_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/metrics/histogram.h"
@@ skipping 1025 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, WebContentsViewPort implementation:
 
 void WebContentsViewAura::CreateView(
     const gfx::Size& initial_size, gfx::NativeView context) {
   // NOTE: we ignore |initial_size| since in some cases it's wrong (such as
   // if the bookmark bar is not shown and you create a new tab). The right
   // value is set shortly after this, so its safe to ignore.
 
-  aura::Env::CreateInstance();
+  aura::Env::CreateInstance(true);
   window_.reset(new aura::Window(this));
   window_->set_owned_by_parent(false);
   window_->SetType(ui::wm::WINDOW_TYPE_CONTROL);
   window_->SetTransparent(false);
   window_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
   aura::Window* root_window = context ? context->GetRootWindow() : NULL;
   if (root_window) {
     // There are places where there is no context currently because object
     // hierarchies are built before they're attached to a Widget. (See
     // views::WebView as an example; GetWidget() returns NULL at the point
@@ skipping 479 matching lines @@
       event.location(),
       gfx::Screen::GetScreenFor(GetNativeView())->GetCursorScreenPoint(),
       ConvertAuraEventFlagsToWebInputEventModifiers(event.flags()));
   if (drag_dest_delegate_)
     drag_dest_delegate_->OnDrop();
   current_drop_data_.reset();
   return ConvertFromWeb(current_drag_op_);
 }
 
 }  // namespace content