Add SafeBrowsing support for checking downloaded zip files that contain executables.

chrome/common/safe_browsing/csd.proto

Index: chrome/common/safe_browsing/csd.proto
diff --git a/chrome/common/safe_browsing/csd.proto b/chrome/common/safe_browsing/csd.proto
index e8fbc8096cdb9acbe1d931d7aa051cb46a006051..c21a7c7ea9ad698b8987f7d1469fca71068d2284 100644
--- a/chrome/common/safe_browsing/csd.proto
+++ b/chrome/common/safe_browsing/csd.proto
@@ -168,6 +168,8 @@ message ClientDownloadRequest {
     WIN_EXECUTABLE = 0;    // Currently all .exe, .cab and .msi files.
     CHROME_EXTENSION = 1;  // .crx files.
     ANDROID_APK = 2;       // .apk files.
+    // .zip files containing one of the above executable types.
+    ZIPPED_WIN_EXECUTABLE = 3;

[mattm, 2012/05/11 22:42:06]

APK isn't a win executable?

[Brian Ryner, 2012/05/11 23:09:41]

It's not, no.  Are you suggesting that we don't ping on APK's inside ZIP files,
or to update this comment to not say "executable"?

[mattm, 2012/05/11 23:12:32]

Oh just that "zipped win executable" contains "one of the above" types, when one
of those types isn't a win executable.  So, more that it shouldn't say "win". 

[Brian Ryner, 2012/05/12 00:06:59]

Sounds reasonable, renamed the enum.

   }
   optional DownloadType download_type = 10 [default = WIN_EXECUTABLE];
 }