Make it possible to have 1 PpapiGlobals per thread. Update unit tests.

ppapi/shared_impl/test_globals.h

Index: ppapi/shared_impl/test_globals.h
diff --git a/ppapi/shared_impl/test_globals.h b/ppapi/shared_impl/test_globals.h
index 9c58fd3f4707d9b26ebce08b54178df8084029af..059ef6416d8400db0af82fa344153fd455773291 100644
--- a/ppapi/shared_impl/test_globals.h
+++ b/ppapi/shared_impl/test_globals.h
@@ -27,6 +27,7 @@ class TestVarTracker : public VarTracker {
 class TestGlobals : public PpapiGlobals {
  public:
   TestGlobals();
+  TestGlobals(PpapiGlobals::ForTest);
   virtual ~TestGlobals();
 
   // PpapiGlobals implementation.
@@ -37,6 +38,7 @@ class TestGlobals : public PpapiGlobals {
   virtual FunctionGroupBase* GetFunctionAPI(PP_Instance inst,
                                             ApiID id) OVERRIDE;
   virtual PP_Module GetModuleForInstance(PP_Instance instance) OVERRIDE;
+  virtual base::Lock* GetProxyLock() OVERRIDE;
 
  private:
   ResourceTracker resource_tracker_;