DevTools: Do not close devtools if there are dirty files in workspace

chrome/browser/ui/browser.cc

 // Copyright 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 "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // defined(OS_WIN)
@@ skipping 1412 matching lines @@
   return false;
 }
 
 gfx::Rect Browser::GetRootWindowResizerRect() const {
   return window_->GetRootWindowResizerRect();
 }
 
 void Browser::BeforeUnloadFired(WebContents* web_contents,
                                 bool proceed,
                                 bool* proceed_to_fire_unload) {
+  if (is_devtools() && DevToolsWindow::HandleBeforeUnload(web_contents,
+        proceed, proceed_to_fire_unload))
+    return;
+
   if (IsFastTabUnloadEnabled()) {
     *proceed_to_fire_unload =
         fast_unload_controller_->BeforeUnloadFired(web_contents, proceed);
   } else {
     *proceed_to_fire_unload =
         unload_controller_->BeforeUnloadFired(web_contents, proceed);
   }
 }
 
 bool Browser::ShouldFocusLocationBarByDefault(WebContents* source) {
@@ skipping 828 matching lines @@
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         content::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }