Re-implement app overlap detection with new extent syntax.

chrome/browser/extensions/extensions_service.cc

 // Copyright (c) 2010 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/extensions/extensions_service.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
@@ skipping 950 matching lines @@
 Extension* ExtensionsService::GetExtensionByWebExtent(const GURL& url) {
   for (size_t i = 0; i < extensions_.size(); ++i) {
     if (extensions_[i]->web_extent().ContainsURL(url))
       return extensions_[i];
   }
   return NULL;
 }
 
 Extension* ExtensionsService::GetExtensionByOverlappingWebExtent(
     const ExtensionExtent& extent) {
-  // TODO(aa): Make this work for the new extents. http://crbug.com/47445.
+  for (size_t i = 0; i < extensions_.size(); ++i) {
+    if (extensions_[i]->web_extent().OverlapsWith(extent))
+      return extensions_[i];
+  }
+
   return NULL;
 }
 
 void ExtensionsService::ClearProvidersForTesting() {
   ChromeThread::PostTask(
       ChromeThread::FILE, FROM_HERE,
       NewRunnableMethod(
           backend_.get(), &ExtensionsServiceBackend::ClearProvidersForTesting));
 }
 
@@ skipping 268 matching lines @@
   // Finish installing on UI thread.
   ChromeThread::PostTask(
       ChromeThread::UI, FROM_HERE,
       NewRunnableMethod(
           frontend_,
           &ExtensionsService::ContinueLoadAllExtensions,
           extensions_to_reload,
           start_time,
           true));
 }