Breakpad: Compile Breakpad into Chromium by default on Mac

ppapi/native_client/src/trusted/plugin/plugin.gyp

Index: ppapi/native_client/src/trusted/plugin/plugin.gyp
diff --git a/ppapi/native_client/src/trusted/plugin/plugin.gyp b/ppapi/native_client/src/trusted/plugin/plugin.gyp
index a74fb920a0ffbbbd0c74cdd60d1fbf19cdc6d143..09680a38dcaca960337f8eb4228ca3d19ad96de3 100644
--- a/ppapi/native_client/src/trusted/plugin/plugin.gyp
+++ b/ppapi/native_client/src/trusted/plugin/plugin.gyp
@@ -114,7 +114,7 @@
               'product_name': 'ppGoogleNaClPluginChrome',
               'product_extension': 'plugin',
             }],
-            ['OS=="mac" and mac_breakpad==1', {
+            ['OS=="mac" and mac_breakpad_symbols==1', {

[noelallen1, 2011/12/10 04:41:39]

Up to this point, I believe you only used mac_breakpad_symbols when you where
already conditionally inside of OS=="mac".   I believe this may be uninitialized
on other platforms.
I am not sure it is legal to assume that the OS=="mac" will safely prevent
mac_breakpad_symbols from being dereferenced at the same unfolding depth. 

               'variables': {
                 # A real .dSYM is needed for dump_syms to operate on.
                 'mac_real_dsym': 1,