Fix more -Wsign-compare warnings in heap, mips, base, etc.

test/unittests/heap/gc-tracer-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <cmath>
 #include <limits>
 
 #include "src/globals.h"
 #include "src/heap/gc-tracer.h"
 #include "src/isolate.h"
@@ skipping 245 matching lines @@
   tracer->AddIncrementalMarkingStep(100, 1000000);
   EXPECT_EQ(1000000 / 100,
             tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
   // Scavenger has no impact on incremental marking details.
   tracer->Start(SCAVENGER, GarbageCollectionReason::kTesting,
                 "collector unittest");
   tracer->Stop(SCAVENGER);
   // 1000000 bytes in 100ms.
   tracer->AddIncrementalMarkingStep(100, 1000000);
   EXPECT_EQ(300, tracer->incremental_marking_duration_);
-  EXPECT_EQ(3000000, tracer->incremental_marking_bytes_);
+  EXPECT_EQ(3000000u, tracer->incremental_marking_bytes_);
   EXPECT_EQ(1000000 / 100,
             tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
   tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
                 "collector unittest");
   // Switch to incremental MC.
   tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
   // 1000000 bytes in 100ms.
   tracer->AddIncrementalMarkingStep(100, 1000000);
   EXPECT_EQ(400, tracer->incremental_marking_duration_);
-  EXPECT_EQ(4000000, tracer->incremental_marking_bytes_);
+  EXPECT_EQ(4000000u, tracer->incremental_marking_bytes_);
   tracer->Stop(MARK_COMPACTOR);
   EXPECT_EQ(400, tracer->current_.incremental_marking_duration);
-  EXPECT_EQ(4000000, tracer->current_.incremental_marking_bytes);
+  EXPECT_EQ(4000000u, tracer->current_.incremental_marking_bytes);
   EXPECT_EQ(0, tracer->incremental_marking_duration_);
-  EXPECT_EQ(0, tracer->incremental_marking_bytes_);
+  EXPECT_EQ(0u, tracer->incremental_marking_bytes_);
   EXPECT_EQ(1000000 / 100,
             tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
 
   // Round 2.
   tracer->AddIncrementalMarkingStep(2000, 1000);
   tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
                 "collector unittest");
   // Switch to incremental MC.
   tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
   tracer->Stop(MARK_COMPACTOR);
   EXPECT_DOUBLE_EQ((4000000.0 / 400 + 1000.0 / 2000) / 2,
                    static_cast<double>(
                        tracer->IncrementalMarkingSpeedInBytesPerMillisecond()));
 }
 
 }  // namespace internal
 }  // namespace v8