Get rid of the following dependencies from content:

chrome/common/chrome_constants.h

 // Copyright (c) 2011 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.
 
 // A handful of resource-like constants related to the Chrome application.
 
 #ifndef CHROME_COMMON_CHROME_CONSTANTS_H_
 #define CHROME_COMMON_CHROME_CONSTANTS_H_
 #pragma once
 
@@ skipping 53 matching lines @@
 extern const FilePath::CharType kUserScriptsDirname[];
 extern const FilePath::CharType kWebDataFilename[];
 extern const FilePath::CharType kBookmarksFileName[];
 extern const FilePath::CharType kHistoryBookmarksFileName[];
 extern const FilePath::CharType kCustomDictionaryFileName[];
 extern const FilePath::CharType kLoginDataFileName[];
 extern const FilePath::CharType kJumpListIconDirname[];
 extern const FilePath::CharType kWebAppDirname[];
 extern const FilePath::CharType kServiceStateFileName[];
 
-extern const unsigned int kMaxRendererProcessCount;
 extern const int kStatsMaxThreads;
 extern const int kStatsMaxCounters;
 
 extern const bool kRecordModeEnabled;
 
 // Most sequence numbers are used by a renderer when responding to a browser
 // request for histogram data.  This reserved number is used when a renderer
 // sends an unprovoked update, such as after a page has been loaded.  Using
 // this reserved constant avoids any chance of confusion with a response having
 // a browser-supplied sequence number.
 extern const int kHistogramSynchronizerReservedSequenceNumber;
 
 // The language code used when the language of a page could not be detected.
 // (Matches what the CLD -Compact Language Detection- library reports.)
 extern const char* const kUnknownLanguageCode;
 
 // If another javascript message box is displayed within
 // kJavascriptMessageExpectedDelay of a previous javascript message box being
 // dismissed, display an option to suppress future message boxes from this
 // contents.
 extern const int kJavascriptMessageExpectedDelay;
 
 // Are touch icons enabled? False by default.
 extern const bool kEnableTouchIcon;
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_CONSTANTS_H_