Adding in most of the unit tests.

core/win/d3d9/effect_d3d9.cc

Index: core/win/d3d9/effect_d3d9.cc
===================================================================
--- core/win/d3d9/effect_d3d9.cc	(revision 19743)
+++ core/win/d3d9/effect_d3d9.cc	(working copy)
@@ -254,7 +254,7 @@
             << "number of params in ParamArray does not match number of params "
             << "needed by shader array";
       } else {
-        for (int i = 0; i < size; ++i) {
+        for (unsigned i = 0; i < size; ++i) {
           SamplerUnitIndexArray& index_array = sampler_unit_index_arrays_[i];
           Param* untyped_element = param->GetUntypedParam(i);
           // TODO(gman): Make this check happen when building the param cache.
@@ -297,7 +297,7 @@
     if (param) {
       unsigned size = param->size();
       if (size == sampler_unit_index_arrays_.size()) {
-        for (int i = 0; i < size; ++i) {
+        for (unsigned i = 0; i < size; ++i) {
           SamplerUnitIndexArray& index_array = sampler_unit_index_arrays_[i];
           Param* untyped_element = param->GetUntypedParam(i);
           // TODO(gman): Make this check happen when building the param cache.