Add a command line switch to allow setting the max size...

chrome/browser/net/chrome_url_request_context.h

Index: chrome/browser/net/chrome_url_request_context.h
===================================================================
--- chrome/browser/net/chrome_url_request_context.h	(revision 19096)
+++ chrome/browser/net/chrome_url_request_context.h	(working copy)
@@ -30,13 +30,13 @@
   // expected to get called on the UI thread.
   static ChromeURLRequestContext* CreateOriginal(
       Profile* profile, const FilePath& cookie_store_path,
-      const FilePath& disk_cache_path);
+      const FilePath& disk_cache_path, int cache_size);
 
   // Create an instance for an original profile for media. This is expected to
   // get called on UI thread. This method takes a profile and reuses the
   // 'original' URLRequestContext for common files.
   static ChromeURLRequestContext* CreateOriginalForMedia(Profile *profile,
-      const FilePath& disk_cache_path);
+      const FilePath& disk_cache_path, int cache_size);
 
   // Create an instance for an original profile for extensions. This is expected
   // to get called on UI thread.
@@ -78,7 +78,7 @@
   // context. This helper method is called from CreateOriginalForMedia and
   // CreateOffTheRecordForMedia.
   static ChromeURLRequestContext* CreateRequestContextForMedia(Profile* profile,
-      const FilePath& disk_cache_path, bool off_the_record);
+      const FilePath& disk_cache_path, int cache_size, bool off_the_record);
 
   // NotificationObserver implementation.
   virtual void Observe(NotificationType type,