Removing useless Win7 checks + standardize its use

chrome/browser/media/webrtc/webrtc_browsertest_base.cc

 // Copyright 2013 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/media/webrtc/webrtc_browsertest_base.h"
 
 #include <stddef.h>
 
 #include <limits>
 
@@ skipping 443 matching lines @@
 std::string WebRtcTestBase::GetStreamSize(
     content::WebContents* tab_contents,
     const std::string& video_element) const {
   std::string javascript =
       base::StringPrintf("getStreamSize('%s')", video_element.c_str());
   std::string result = ExecuteJavascript(javascript, tab_contents);
   EXPECT_TRUE(base::StartsWith(result, "ok-", base::CompareCase::SENSITIVE));
   return result.substr(3);
 }
 
-bool WebRtcTestBase::OnWin8() const {
+bool WebRtcTestBase::OnWin8OrHigher() const {
 #if defined(OS_WIN)
-  return base::win::GetVersion() > base::win::VERSION_WIN7;
+  return base::win::GetVersion() >= base::win::VERSION_WIN8;
 #else
   return false;
 #endif
 }
 
 void WebRtcTestBase::OpenDatabase(content::WebContents* tab) const {
   EXPECT_EQ("ok-database-opened", ExecuteJavascript("openDatabase()", tab));
 }
 
 void WebRtcTestBase::CloseDatabase(content::WebContents* tab) const {
@@ skipping 103 matching lines @@
 
 void WebRtcTestBase::VerifyRtpReceivers(
     content::WebContents* tab,
     base::Optional<size_t> expected_num_tracks) const {
   std::string javascript =
       expected_num_tracks ? "verifyRtpReceivers(" +
                                 base::SizeTToString(*expected_num_tracks) + ")"
                           : "verifyRtpReceivers()";
   EXPECT_EQ("ok-receivers-verified", ExecuteJavascript(javascript, tab));
 }