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

gpu/command_buffer/service/command_buffer_service_unittest.cc

Index: gpu/command_buffer/service/command_buffer_service_unittest.cc
===================================================================
--- gpu/command_buffer/service/command_buffer_service_unittest.cc	(revision 37832)
+++ gpu/command_buffer/service/command_buffer_service_unittest.cc	(working copy)
@@ -65,7 +65,6 @@
 }
 
 TEST_F(CommandBufferServiceTest, InitializeFailsSecondTime) {
-  SharedMemory* ring_buffer = new SharedMemory;
   EXPECT_TRUE(command_buffer_->Initialize(1024));
   EXPECT_FALSE(command_buffer_->Initialize(1024));
 }
@@ -117,7 +116,7 @@
   EXPECT_EQ(1, handle);
   Buffer buffer = command_buffer_->GetTransferBuffer(handle);
   ASSERT_TRUE(NULL != buffer.ptr);
-  EXPECT_EQ(1024, buffer.size);
+  EXPECT_EQ(1024u, buffer.size);
 }
 
 TEST_F(CommandBufferServiceTest, CreateTransferBufferReturnsDistinctHandles) {