Use FORCE_64BIT_ALIGN to make sure that aes_cbc_ctx_t allocated by aes_cbc_alloc is 64-bit aligned.

libsrtp.gyp

Index: libsrtp.gyp
===================================================================
--- libsrtp.gyp	(revision 292049)
+++ libsrtp.gyp	(working copy)
@@ -61,6 +61,13 @@
           'CPU_RISC',
         ],
       }],
+      ['target_arch=="mipsel" or target_arch=="arm" or target_arch=="armv7" or target_arch=="ia32"', {
+        'defines': [
+          # Define FORCE_64BIT_ALIGN to avoid alignment-related-crashes like
+          # crbug/414919.

[Sergey Ulanov, 2014/09/22 21:57:52]

It would be useful to have more details here to explain what it does and why it
is necessary. Currently one has to read the bug to figure it out. 

+          'FORCE_64BIT_ALIGN',
+        ],
+      }],
     ],
     'direct_dependent_settings': {
       'include_dirs': [