Fix ninja build for android.

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index 99c826cbf48721234be00ef67e095371cf85b7d8..234cd626de7bcf16a48665b1936e068d509c1ad3 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -671,7 +671,7 @@
               'inputs': [
                 '../testing/android/AndroidManifest.xml',
                 '../testing/android/generate_native_test.py',
-                '<(PRODUCT_DIR)/lib.target/libbase_unittests.so',
+                '<(SHARED_LIB_DIR)/libbase_unittests.so',
                 '<(PRODUCT_DIR)/lib.java/chromium_base.jar'
               ],
               'outputs': [
@@ -680,13 +680,13 @@
               'action': [ 
                 '../testing/android/generate_native_test.py',
                 '--native_library',
-                '<(PRODUCT_DIR)/lib.target/libbase_unittests.so',
+                '<(SHARED_LIB_DIR)/libbase_unittests.so',
                 '--jar',
                 '<(PRODUCT_DIR)/lib.java/chromium_base.jar',
                 '--output',
                 '<(PRODUCT_DIR)/base_unittests_apk',
                 '--ant-args', 
-                '-DPRODUCT_DIR=<(PRODUCT_DIR)',
+                '-DPRODUCT_DIR=`realpath <(PRODUCT_DIR)`',

[John Grabowski, 2012/05/17 05:44:30]

OSX has no realpath cmd.  (Eventually we want to support OSX I think.)  How
about $(cd <(PRODUCT_DIR) && pwd -P) ?

In any case, how about a new var ABSOLUTE_PRODUCT_DIR set in common.gypi and use
that instead?  So we can realpath (or os.path.realpath, or whatever) in a single
place.

                 '--ant-compile'
               ],
             },