gpu: Use explicit atomics instead of assuming that 32bit read/writes are atomic.

gpu/command_buffer/client/query_tracker_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Tests for the QueryTracker.
 
 #include "gpu/command_buffer/client/query_tracker.h"
 
 #include <GLES2/gl2ext.h>
 #include "base/memory/scoped_ptr.h"
@@ skipping 36 matching lines @@
 };
 
 TEST_F(QuerySyncManagerTest, Basic) {
   QuerySyncManager::QueryInfo infos[4];
   memset(&infos, 0xBD, sizeof(infos));
 
   for (size_t ii = 0; ii < arraysize(infos); ++ii) {
     EXPECT_TRUE(sync_manager_->Alloc(&infos[ii]));
     EXPECT_NE(0, infos[ii].shm_id);
     ASSERT_TRUE(infos[ii].sync != NULL);
-    EXPECT_EQ(0u, infos[ii].sync->process_count);
+    EXPECT_EQ(0, infos[ii].sync->process_count);
     EXPECT_EQ(0u, infos[ii].sync->result);
   }
 
   for (size_t ii = 0; ii < arraysize(infos); ++ii) {
     sync_manager_->Free(infos[ii]);
   }
 }
 
 TEST_F(QuerySyncManagerTest, DontFree) {
   QuerySyncManager::QueryInfo infos[4];
@@ skipping 63 matching lines @@
   const int32 kToken = 46;
   const uint32 kResult = 456;
 
   // Create a Query.
   QueryTracker::Query* query = query_tracker_->CreateQuery(
       kId1, GL_ANY_SAMPLES_PASSED_EXT);
   ASSERT_TRUE(query != NULL);
   EXPECT_TRUE(query->NeverUsed());
   EXPECT_FALSE(query->Pending());
   EXPECT_EQ(0, query->token());
-  EXPECT_EQ(0u, query->submit_count());
+  EXPECT_EQ(0, query->submit_count());
 
   // Check MarkAsActive.
   query->MarkAsActive();
   EXPECT_FALSE(query->NeverUsed());
   EXPECT_FALSE(query->Pending());
   EXPECT_EQ(0, query->token());
-  EXPECT_EQ(1u, query->submit_count());
+  EXPECT_EQ(1, query->submit_count());
 
   // Check MarkAsPending.
   query->MarkAsPending(kToken);
   EXPECT_FALSE(query->NeverUsed());
   EXPECT_TRUE(query->Pending());
   EXPECT_EQ(kToken, query->token());
-  EXPECT_EQ(1u, query->submit_count());
+  EXPECT_EQ(1, query->submit_count());
 
   // Check CheckResultsAvailable.
   EXPECT_FALSE(query->CheckResultsAvailable(helper_.get()));
   EXPECT_FALSE(query->NeverUsed());
   EXPECT_TRUE(query->Pending());
 
   // Simulate GPU process marking it as available.
   QuerySync* sync = GetSync(query);
   sync->process_count = query->submit_count();
   sync->result = kResult;
@@ skipping 35 matching lines @@
 
   // Check FreeCompletedQueries.
   query_tracker_->FreeCompletedQueries();
   EXPECT_EQ(0u, bucket->used_query_count);
 }
 
 }  // namespace gles2
 }  // namespace gpu