Fix -Wsign-compare bugs with GCC 4.9.2

R=svenpanne@chromium.org
LOG=N
BUG=

Review URL: https://codereview.chromium.org/1105653002

Cr-Commit-Position: refs/heads/master@{#28039}

src/compiler/register-allocator.cc

@@ -2218,7 +2218,7 @@ float GreedyAllocator::CalculateSpillWeight(LiveRange* range) {
 
   // GetLiveRangeSize is DCHECK-ed to not be 0
   unsigned range_size = GetLiveRangeSize(range);
-  DCHECK_NE(0, range_size);
+  DCHECK_NE(0U, range_size);
 
   return static_cast<float>(use_count) / static_cast<float>(range_size);
 }

src/deoptimizer.cc

@@ -2257,7 +2257,7 @@ void Deoptimizer::DoTranslateObject(TranslationIterator* iterator,
         AddObjectTaggedValue(
             reinterpret_cast<intptr_t>(isolate_->heap()->false_value()));
       } else {
-        DCHECK_EQ(1, value);
+        DCHECK_EQ(1U, value);
         AddObjectTaggedValue(
             reinterpret_cast<intptr_t>(isolate_->heap()->true_value()));
       }
@@ -2367,7 +2367,7 @@ void Deoptimizer::DoTranslateObject(TranslationIterator* iterator,
         AddObjectTaggedValue(
             reinterpret_cast<intptr_t>(isolate_->heap()->false_value()));
       } else {
-        DCHECK_EQ(1, value);
+        DCHECK_EQ(1U, value);
         AddObjectTaggedValue(
             reinterpret_cast<intptr_t>(isolate_->heap()->true_value()));
       }
@@ -2573,7 +2573,7 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
             output_offset,
             reinterpret_cast<intptr_t>(isolate_->heap()->false_value()));
       } else {
-        DCHECK_EQ(1, value);
+        DCHECK_EQ(1U, value);
         output_[frame_index]->SetFrameSlot(
             output_offset,
             reinterpret_cast<intptr_t>(isolate_->heap()->true_value()));
@@ -2699,7 +2699,7 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
             output_offset,
             reinterpret_cast<intptr_t>(isolate_->heap()->false_value()));
       } else {
-        DCHECK_EQ(1, value);
+        DCHECK_EQ(1U, value);
         output_[frame_index]->SetFrameSlot(
             output_offset,
             reinterpret_cast<intptr_t>(isolate_->heap()->true_value()));
@@ -3456,7 +3456,7 @@ Handle<Object> SlotRef::GetValue(Isolate* isolate) {
       if (value == 0) {
         return isolate->factory()->false_value();
       } else {
-        DCHECK_EQ(1, value);
+        DCHECK_EQ(1U, value);
         return isolate->factory()->true_value();
       }
     }