Remove code path that passes a file handle to the renderer

Since the code now does range request without any caching
the code path for passing file handle is not used any more.

Changes:
1. Remove response_data_file in webkit_glue::ResourceResponseHead
2. Remove response_data_file in net::ResourceInfo
3. Remove code that passes file handle using IPC
4. Remove code that passes file hadnle from network layer to ResourceDispatcherHost
5. Remove MediaResourceHandler
6. Remove code in disk_cache that expose the file handle
7. Remove ChromeURLRequestContext::CreateOffTheRecordForMedia() so no more OTR request context for media, in OTR mode simply memory cache is used
8. Reset cache size for media cache to default

BUG=12249
BUG=12256

Review URL: http://codereview.chromium.org/113931

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17227 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 4 insertions, 25 deletions

diff --git a/chrome/browser/net/chrome_url_request_context.cc b/chrome/browser/net/chrome_url_request_context.cc
index 6a3f404..304b506 100644
--- a/chrome/browser/net/chrome_url_request_context.cc
+++ b/chrome/browser/net/chrome_url_request_context.cc
@@ -197,16 +197,6 @@ ChromeURLRequestContext* ChromeURLRequestContext::CreateOffTheRecord(
 }
 
 // static
-ChromeURLRequestContext* ChromeURLRequestContext::CreateOffTheRecordForMedia(
-  Profile* profile, const FilePath& disk_cache_path) {
-  // TODO(hclam): since we don't have an implementation of disk cache backend
-  // for media files in OTR mode, we create a request context just like the
-  // original one.
-  DCHECK(profile->IsOffTheRecord());
-  return CreateRequestContextForMedia(profile, disk_cache_path, true);
-}
-
-// static
 ChromeURLRequestContext*
 ChromeURLRequestContext::CreateOffTheRecordForExtensions(Profile* profile) {
   DCHECK(profile->IsOffTheRecord());
@@ -233,8 +223,7 @@ ChromeURLRequestContext* ChromeURLRequestContext::CreateRequestContextForMedia(
   // Also share the cookie store of the common profile.
   context->cookie_store_ = original_context->cookie_store();
 
-  // Create a media cache with maximum size of ~1.8GB, which is a
-  // size cache backend won't complain.
+  // Create a media cache with default size.
   // TODO(hclam): make the maximum size of media cache configurable.
   net::HttpCache* original_cache =
       original_context->http_transaction_factory()->GetCache();
@@ -248,21 +237,15 @@ ChromeURLRequestContext* ChromeURLRequestContext::CreateRequestContextForMedia(
     net::HttpNetworkLayer* original_network_layer =
         static_cast<net::HttpNetworkLayer*>(original_cache->network_layer());
     cache = new net::HttpCache(original_network_layer->GetSession(),
-        disk_cache_path.ToWStringHack(), kint32max - kint32max / 10 - 1);
+                               disk_cache_path.ToWStringHack(), 0);
   } else {
     // If original HttpCache doesn't exist, simply construct one with a whole
     // new set of network stack.
     cache = new net::HttpCache(original_context->proxy_service(),
-        disk_cache_path.ToWStringHack(), kint32max - kint32max / 10 - 1);
-  }
-
-  // Set the cache type to media.
-  if (off_the_record) {
-    cache->set_type(net::TEMP_MEDIA_CACHE);
-  } else {
-    cache->set_type(net::MEDIA_CACHE);
+                               disk_cache_path.ToWStringHack(), 0);
   }
 
+  cache->set_type(net::MEDIA_CACHE);
   context->http_transaction_factory_ = cache;
   return context;
 }
diff --git a/chrome/browser/net/chrome_url_request_context.h b/chrome/browser/net/chrome_url_request_context.h
index 5ef64d6..bf8d119 100644
--- a/chrome/browser/net/chrome_url_request_context.h
+++ b/chrome/browser/net/chrome_url_request_context.h
@@ -47,10 +47,6 @@ class ChromeURLRequestContext : public URLRequestContext,
   // called on the UI thread.
   static ChromeURLRequestContext* CreateOffTheRecord(Profile* profile);
 
-  // Create an instance of request context for OTR profile for media resources.
-  static ChromeURLRequestContext* CreateOffTheRecordForMedia(Profile* profile,
-      const FilePath& disk_cache_path);
-
   // Create an instance of request context for OTR profile for extensions.
   static ChromeURLRequestContext* CreateOffTheRecordForExtensions(
       Profile* profile);