add gflags to deps to allow command line parameters.

unittests currently use environment variables to change behavior.
using gflags this can be done via command line.

R=kjellander@chromium.org
BUG=libyuv:507

Review URL: https://codereview.chromium.org/1402313002 .

DEPS

@@ -9,6 +9,16 @@ vars = {
   'chromium_revision': 'bb79186c63ff4eff7a2a318a21731005c53f269b',
 }
 
+# NOTE: Prefer revision numbers to tags for svn deps. Use http rather than
+# https; the latter can cause problems for users behind proxies.
+deps = {
+  'src/third_party/gflags/src':
+    Var('chromium_git') + '/external/gflags/src@e7390f9185c75f8d902c05ed7d20bb94eb914d0c', # from svn revision 82
+}
+
+# Define rules for which include paths are allowed in our source.
+include_rules = [ '+gflags' ]
+
 hooks = [
   {
     # Clone chromium and its deps.

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1512
+Version: 1513
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1512
+#define LIBYUV_VERSION 1513
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT