Fixed compile/link errors for gpu unit-tests. I had to mostly fix signed/unsi...

gpu/command_buffer/service/cmd_parser_test.cc

Index: gpu/command_buffer/service/cmd_parser_test.cc
===================================================================
--- gpu/command_buffer/service/cmd_parser_test.cc	(revision 37832)
+++ gpu/command_buffer/service/cmd_parser_test.cc	(working copy)
@@ -70,8 +70,8 @@
 // Tests initialization conditions.
 TEST_F(CommandParserTest, TestInit) {
   scoped_ptr<CommandParser> parser(MakeParser(10));
-  EXPECT_EQ(0u, parser->get());
-  EXPECT_EQ(0u, parser->put());
+  EXPECT_EQ(0, parser->get());
+  EXPECT_EQ(0, parser->put());
   EXPECT_TRUE(parser->IsEmpty());
 }
 
@@ -201,7 +201,7 @@
   param.value_int32 = 5;
   AddDoCommandExpect(error::kNoError, 3, 1, &param);
 
-  DCHECK_EQ(5u, put);
+  DCHECK_EQ(5, put);
   put = 0;
   parser->set_put(put);
   EXPECT_EQ(put, parser->put());