Allow building Official Chrome builds in Debug on ARM by avoiding overcommitting registers.

Review URL: https://chromiumcodereview.appspot.com/11198019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162414 0039d316-1c4b-4281-b951-d872f2087c98

breakpad/breakpad.gyp

@@ -532,6 +532,11 @@
             ['target_arch=="arm" and OS!="android"', {
               'cflags': ['-Wa,-mimplicit-it=always'],
             }],
+            ['target_arch=="arm" and chromeos==1', {
+              # Avoid running out of registers in
+              # linux_syscall_support.h:sys_clone()'s inline assembly.
+              'cflags': ['-marm'],
+            }],
             ['OS=="android"', {
               'include_dirs': [
                 'src/common/android/include',