Update StartsWith calls to use new versions in chrome and content

chrome/browser/media/webrtc_browsertest_base.cc

Index: chrome/browser/media/webrtc_browsertest_base.cc
diff --git a/chrome/browser/media/webrtc_browsertest_base.cc b/chrome/browser/media/webrtc_browsertest_base.cc
index 7245821502e020ec4c2d738829537ef9e8f5f162..52707ebe04de4348f6dd4b840977ad461d69447b 100644
--- a/chrome/browser/media/webrtc_browsertest_base.cc
+++ b/chrome/browser/media/webrtc_browsertest_base.cc
@@ -292,7 +292,7 @@ std::string WebRtcTestBase::GetStreamSize(
   std::string javascript =
       base::StringPrintf("getStreamSize('%s')", video_element.c_str());
   std::string result = ExecuteJavascript(javascript, tab_contents);
-  EXPECT_TRUE(base::StartsWithASCII(result, "ok-", true));
+  EXPECT_TRUE(base::StartsWith(result, "ok-", base::CompareCase::SENSITIVE));
   return result.substr(3);
 }