[MIPS] Add support to gyp files to build Native Client inside of Chromium

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 665e46e7c57ec61da07beb045aacc46b35bd961d..cb2efd9154c2bf5aa89be6cb49ef04adca6c689a 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -204,6 +204,14 @@
           'NACL_TARGET_SUBARCH=32',
         ],
       }],
+      ['target_arch=="mipsel"', {
+        'defines': [
+          'NACL_BUILD_ARCH=mipsel',

[Mark Seaborn, 2013/09/20 23:11:17]

Why not "mips" instead of "mipsel"?  Then we don't need the nacl_base.h change.

[petarj, 2013/09/23 17:49:24]

Done.

+          'NACL_BUILD_SUBARCH=32',
+          'NACL_TARGET_ARCH=mipsel',
+          'NACL_TARGET_SUBARCH=32',
+        ],
+      }],
       ['linux2==1', {
         'defines': ['LINUX2=1'],
       }],
@@ -337,7 +345,18 @@
                       ],
                   }],
               ],
-            }, { # else: target_arch != "arm"
+            }],
+            ['target_arch=="mipsel"', {
+              # Copied from chromium build/common.gypi
+              'conditions': [
+                ['mips_arch_variant=="mips32r2"', {
+                    'cflags': ['-mips32r2'],

[Mark Seaborn, 2013/09/20 23:11:17]

Indent by 1 fewer space (i.e. 2 spaces per indentation level)

[petarj, 2013/09/23 17:49:24]

Done.

+                }, {
+                    'cflags': ['-mips32'],

[Mark Seaborn, 2013/09/20 23:11:17]

Same here

[petarj, 2013/09/23 17:49:24]

Done.

+                }],
+              ],
+            }],
+            ['target_arch=="ia32" or target_arch=="x64"', {
               'conditions': [
                 ['target_arch=="x64"', {
                   'variables': {