Prefix search code improvement in tab_capture_api.cc

chrome/browser/extensions/api/tab_capture/tab_capture_api.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.
 
 // Implements the Chrome Extensions Tab Capture API.
 
 #include "chrome/browser/extensions/api/tab_capture/tab_capture_api.h"
 
 #include <algorithm>
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/macros.h"
+#include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/tab_capture/offscreen_tab.h"
 #include "chrome/browser/extensions/api/tab_capture/tab_capture_registry.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 52 matching lines @@
 // "goog" prefix.  These are never needed and may cause the renderer-side
 // getUserMedia() call to fail.  http://crbug.com/579729
 //
 // TODO(miu): Remove once tabCapture API is migrated to new constraints spec.
 // http://crbug.com/579729
 void FilterDeprecatedGoogConstraints(TabCapture::CaptureOptions* options) {
   const auto FilterGoogKeysFromDictionary = [](base::DictionaryValue* dict) {
     std::vector<std::string> bad_keys;
     base::DictionaryValue::Iterator it(*dict);
     for (; !it.IsAtEnd(); it.Advance()) {
-      if (it.key().find("goog") == 0)
+      if (base::StartsWith(it.key(), "goog", base::CompareCase::SENSITIVE))
         bad_keys.push_back(it.key());
     }
     for (const std::string& k : bad_keys) {
       std::unique_ptr<base::Value> ignored;
       dict->RemoveWithoutPathExpansion(k, &ignored);
     }
   };
 
   if (options->audio_constraints) {
     FilterGoogKeysFromDictionary(
@@ skipping 261 matching lines @@
     }
   }
 
   // No maximum size was provided, so just return the default size bounded by
   // the minimum size.
   return gfx::Size(std::max(kDefaultWidth, min_size.width()),
                    std::max(kDefaultHeight, min_size.height()));
 }
 
 }  // namespace extensions