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

1 files changed, 0 insertions, 23 deletions

diff --git a/net/disk_cache/disk_cache.h b/net/disk_cache/disk_cache.h
index 5eb6d2c..de40554 100644
--- a/net/disk_cache/disk_cache.h
+++ b/net/disk_cache/disk_cache.h
@@ -12,7 +12,6 @@
 #include <vector>
 
 #include "base/basictypes.h"
-#include "base/platform_file.h"
 #include "base/time.h"
 #include "net/base/cache_type.h"
 #include "net/base/completion_callback.h"
@@ -155,28 +154,6 @@ class Entry {
                         net::CompletionCallback* completion_callback,
                         bool truncate) = 0;
 
-  // Prepares a target stream as an external file, returns a corresponding
-  // base::PlatformFile if successful, returns base::kInvalidPlatformFileValue
-  // if fails. If this call returns a valid base::PlatformFile value (i.e.
-  // not base::kInvalidPlatformFileValue), there is no guarantee that the file
-  // is truncated. Implementor can always return base::kInvalidPlatformFileValue
-  // if external file is not available in that particular implementation.
-  // The caller should close the file handle returned by this method or there
-  // will be a leak.
-  // With a stream prepared as an external file, the stream would always be
-  // kept in an external file since creation, even if the stream has 0 bytes.
-  // So we need to be cautious about using this option for preparing a stream or
-  // we will end up having a lot of empty cache files. Calling this method also
-  // means that all data written to the stream will always be written to file
-  // directly *without* buffering.
-  virtual base::PlatformFile UseExternalFile(int index) = 0;
-
-  // Returns an asynchronous read file handle for the cache stream referenced by
-  // |index|. Values other than base::kInvalidPlatformFileValue are successful
-  // and the file handle should be managed by the caller, i.e. the caller should
-  // close the handle after use or there will be a leak.
-  virtual base::PlatformFile GetPlatformFile(int index) = 0;
-
  protected:
   virtual ~Entry() {}
 };