Adds empty methods to Mutex on platforms where Google Test is not thread-safe. This will support a reentrancy fix in Google Mock.
Adds empty methods to Mutex on platforms where Google Test is not thread-safe. This will support a reentrancy fix in Google Mock.

git-svn-id: 2c9a99be47d0e569b9832cc4192b2d4c0ac487c7@605 861a406c-534a-0410-8894-cb66d6ee9925

surtrstudios/gtest,imoldman/google-test-svn,hugopeixoto/googletest,scudette/gtest,maolin-cdzl/googletest,robbriggs/googletest,MoonCollider/googletest,axiak/googletest,FrankenBit/googletest,cpp-mirrors/gtest,balp/googletest,chrisdembia/googletest,okwasi/googletest,hunter-packages/gtest,bmatheny/gtest,notogawa/googletest,balp/googletest,cpp-netlib/gtest,cryporchild/googletest,dustyleary/googletest,aldebaran/gtest,xin3liang/platform_external_chromium_org_testing_gtest,liquid-mirror/googletest,openpeer/gtest,bpsinc-native/src_testing_gtest,abyss7/googletest,JanX2/googletest,istarc/googletest,svn2github/gtest,skroll/gtest,MiraGeoscience/googletest,svn2github/googletest,istarc/googletest,mydrive/gtest,IllusionRom-deprecated/android_platform_external_chromium_org_testing_gtest,hazelnusse/googletest-git-clone,xin3liang/platform_external_chromium_org_testing_gtest,duanhjlt/gtest,martinhansdk/googletest,bref/googletest,hazelnusse/googletest-git-clone,imoldman/google-test-svn,ignatz/gtest,dustyleary/googletest,JanX2/googletest,adblockplus/googletest,stevekolk/gtest,AOSPU/external_chromium_org_testing_gtest,stevekolk/gtest,svn2github/chromium-gtest,RLovelett/googletest,adblockplus/googletest,xin3liang/platform_external_chromium_org_testing_gtest,limbolily/gtest,avsej/googletest,tomgr/googletest-mirror,dreamer-dead/google-test,imoldman/google-test-svn,hugopeixoto/googletest,Distrotech/googletest,imoldman/google-test-svn,chrisdembia/googletest,notogawa/googletest,bpsinc-native/src_testing_gtest,robbriggs/googletest,dmonakhov/googletest,if1live/googletest-svn,geekboxzone/lollipop_external_chromium_org_testing_gtest,chrissli-u/google-test,FrankenBit/googletest,mwoehlke/gtest,inexor-game/googletest,martinhansdk/googletest,guywithnose/android-googletest,android-ia/platform_external_chromium_org_testing_gtest,Distrotech/googletest,liquid-mirror/googletest,MoonCollider/googletest,tomgr/googletest-mirror,FrankenBit/googletest,emchristiansen/gtest-sbt-cpp,limbolily/gtest,ttyangf/pdfium_gtest,fathomdb/gtest,hugopeixoto/googletest,MoonCollider/googletest,grumpycoders/googletest,Distrotech/googletest,AOSPU/external_chromium_org_testing_gtest,styxyang/googletest-git,calebthompson/googletest,stp/googletest,bmatheny/gtest,bmatheny/gtest,MIPS/external-chromium_org-testing-gtest,ttyangf/pdfium_gtest,geekboxzone/lollipop_external_chromium_org_testing_gtest,svn2github/googletest,liquid-mirror/googletest,guywithnose/android-googletest,abyss7/googletest,okwasi/googletest,duanhjlt/gtest,Luxoft/gtest,mwoehlke/gtest,cpp-netlib/gtest,inexor-game/googletest,tomgr/googletest-mirror,MiraGeoscience/googletest,ignatz/gtest,mwoehlke/gtest,tomgr/googletest-mirror,SAPikachu/googletest,balp/googletest,styxyang/googletest-git,bastih/googletest-mirror,emchristiansen/gtest-sbt-cpp,svn2github/googletest,hunter-packages/gtest,plexinc/googletest,emchristiansen/gtest-sbt-cpp,IllusionRom-deprecated/android_platform_external_chromium_org_testing_gtest,robbriggs/googletest,ignatz/gtest,r12f/googletest,fathomdb/gtest,martindam/googletest,geekboxzone/lollipop_external_chromium_org_testing_gtest,r12f/googletest,balp/googletest,MIPS/external-chromium_org-testing-gtest,plexinc/googletest,Omegaphora/external_chromium_org_testing_gtest,mydrive/gtest,stevekolk/gtest,fathomdb/gtest,grumpycoders/googletest,grumpycoders/googletest,bastih/googletest-mirror,plexinc/googletest,codingdojotw/gtest-mirror,IllusionRom-deprecated/android_platform_external_chromium_org_testing_gtest,fathomdb/gtest,Omegaphora/external_chromium_org_testing_gtest,liquid-mirror/googletest,xin3liang/platform_external_chromium_org_testing_gtest,maolin-cdzl/googletest,if1live/googletest-svn,yinquan529/platform-external-chromium_org-testing-gtest,cryporchild/googletest,openpeer/gtest,IllusionRom-deprecated/android_platform_external_chromium_org_testing_gtest,stp/googletest,dmonakhov/googletest,styxyang/googletest-git,codingdojotw/gtest-mirror,RLovelett/googletest,surtrstudios/gtest,open-eid/googletest,sensorflo/gtest,dmonakhov/googletest,cpp-mirrors/gtest,chrissli-u/google-test,grumpycoders/googletest,JanX2/googletest,dreamer-dead/google-test,martindam/googletest,svn2github/chromium-gtest,cryporchild/googletest,maolin-cdzl/googletest,chrissli-u/google-test,dreamer-dead/google-test,MoonCollider/googletest,MiraGeoscience/googletest,cpp-netlib/gtest,r12f/googletest,mydrive/gtest,open-eid/googletest,martinhansdk/googletest,notogawa/googletest,skroll/gtest,hazelnusse/googletest-git-clone,dustyleary/googletest,hunter-packages/gtest,dmonakhov/googletest,svn2github/gtest,open-eid/googletest,guywithnose/android-googletest,styxyang/googletest-git,openpeer/gtest,AOSPU/external_chromium_org_testing_gtest,sensorflo/gtest,Luxoft/gtest,skroll/gtest,chrisdembia/googletest,Luxoft/gtest,MIPS/external-chromium_org-testing-gtest,adblockplus/googletest,istarc/googletest,scudette/gtest,calebthompson/googletest,svn2github/chromium-gtest,bref/googletest,inexor-game/googletest,cpp-netlib/gtest,dreamer-dead/google-test,RLovelett/googletest,Distrotech/googletest,sensorflo/gtest,calebthompson/googletest,martinhansdk/googletest,notogawa/googletest,svn2github/gtest,emchristiansen/gtest-sbt-cpp,RLovelett/googletest,alksl/googletest,android-ia/platform_external_chromium_org_testing_gtest,svn2github/gtest,avsej/googletest,scudette/gtest,duanhjlt/gtest,alksl/googletest,JanX2/googletest,SAPikachu/googletest,bastih/googletest-mirror,mwoehlke/gtest,plexinc/googletest,if1live/googletest-svn,abyss7/googletest,MIPS/external-chromium_org-testing-gtest,axiak/googletest,FrankenBit/googletest,Omegaphora/external_chromium_org_testing_gtest,SAPikachu/googletest,chrisdembia/googletest,bref/googletest,bpsinc-native/src_testing_gtest,yinquan529/platform-external-chromium_org-testing-gtest,cpp-mirrors/gtest,martindam/googletest,chrissli-u/google-test,maolin-cdzl/googletest,axiak/googletest,guywithnose/android-googletest,surtrstudios/gtest,stevekolk/gtest,cryporchild/googletest,skroll/gtest,dustyleary/googletest,open-eid/googletest,hazelnusse/googletest-git-clone,android-ia/platform_external_chromium_org_testing_gtest,bref/googletest,SAPikachu/googletest,alksl/googletest,bmatheny/gtest,ignatz/gtest,surtrstudios/gtest,svn2github/googletest,MiraGeoscience/googletest,yinquan529/platform-external-chromium_org-testing-gtest,if1live/googletest-svn,cpp-mirrors/gtest,svn2github/chromium-gtest,inexor-game/googletest,sensorflo/gtest,okwasi/googletest,avsej/googletest,robbriggs/googletest,okwasi/googletest,ttyangf/pdfium_gtest,codingdojotw/gtest-mirror,mydrive/gtest,calebthompson/googletest,limbolily/gtest,alksl/googletest,stp/googletest,bastih/googletest-mirror,stp/googletest,codingdojotw/gtest-mirror