Roll gtest.

testing/gtest.gyp

Index: testing/gtest.gyp
diff --git a/testing/gtest.gyp b/testing/gtest.gyp
index dd9435eab57e82cb654af398456d989f031c111b..32e411f6165c5814006bc9a7fd8915799bdbd60b 100644
--- a/testing/gtest.gyp
+++ b/testing/gtest.gyp
@@ -15,8 +15,8 @@
         '<@(gtest_sources)',
       ],
       'include_dirs': [
-        'gtest',
-        'gtest/include',
+        'third_party/googletest/googletest',
+        'third_party/googletest/googletest/include',
       ],
       'dependencies': [
         'gtest_prod',
@@ -158,7 +158,7 @@
           'UNIT_TEST',
         ],
         'include_dirs': [
-          'gtest/include',  # So that gtest headers can find themselves.
+          'third_party/googletest/googletest/include',  # So that gtest headers can find themselves.
         ],
         'target_conditions': [
           ['_type=="executable"', {
@@ -198,7 +198,7 @@
         'gtest',
       ],
       'sources': [
-        'gtest/src/gtest_main.cc',
+        'third_party/googletest/googletest/src/gtest_main.cc',
       ],
     },
     {
@@ -207,6 +207,7 @@
       'type': 'none',
       'sources': [
         'gtest/include/gtest/gtest_prod.h',
+        'third_party/googletest/googletest/include/gtest/gtest_prod.h',
       ],
     },
   ],