Add media file validation to utility process

chrome/common/chrome_utility_messages.h

Index: chrome/common/chrome_utility_messages.h
diff --git a/chrome/common/chrome_utility_messages.h b/chrome/common/chrome_utility_messages.h
index 3534f60e17e8a0635e08dfd07b7eb79763058e45..2033c1c9e6e4475f28bccf72b22c46193a1f81c2 100644
--- a/chrome/common/chrome_utility_messages.h
+++ b/chrome/common/chrome_utility_messages.h
@@ -189,6 +189,14 @@ IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_IndexPicasaAlbumsContents,
                      std::vector<picasa::FolderINIContents> /* folders_inis */)
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
+// Tell the utility process to attempt to validate the passed media file. The
+// file will undergo basic sanity checks and will be decoded for up to
+// |milliseconds_of_decoding|. It is still not safe to decode the file in the

[Lei Zhang, 2013/08/07 20:56:21]

Is the time wall clock time, or time in the media file?

[vandebo (ex-Chrome), 2013/08/07 21:00:43]

"wall clock time" added

+// browser process after this check.
+IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_CheckMediaFile,

[Lei Zhang, 2013/08/07 20:56:21]

Put this in the OS_WIN / OS_MACOSX section above? Ditto elsewhere.

[vandebo (ex-Chrome), 2013/08/07 21:00:43]

Also applies to Linux.

[Lei Zhang, 2013/08/07 22:30:14]

Oh right. Should this be !(Android || iOS) then, since there's no media
galleries on those platforms?

[vandebo (ex-Chrome), 2013/08/07 23:26:12]

Done.

+                     int64 /* milliseconds_of_decoding */,
+                     IPC::PlatformFileForTransit /* Media file to parse */)
+
 //------------------------------------------------------------------------------
 // Utility process host messages:
 // These are messages from the utility process to the browser.
@@ -312,3 +320,8 @@ IPC_MESSAGE_CONTROL3(ChromeUtilityHostMsg_ParsePicasaPMPDatabase_Finished,
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_IndexPicasaAlbumsContents_Finished,
                      picasa::AlbumImagesMap /* albums_images */)
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
+
+// Reply after checking the passed media file. A true result indicates that
+// the file appears to be a well formed media file.
+IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_CheckMediaFile_Finished,
+                     bool /* passed_checks */)