Make FencedAlloctor fail on size = 0.

gpu/command_buffer/client/fenced_allocator_test.cc

Index: gpu/command_buffer/client/fenced_allocator_test.cc
diff --git a/gpu/command_buffer/client/fenced_allocator_test.cc b/gpu/command_buffer/client/fenced_allocator_test.cc
index 381237bbe48fd4672a1d5c95cab5b7ea20f2cfba..44fb851e3498d09cdd75974c0f8d33265481e26f 100644
--- a/gpu/command_buffer/client/fenced_allocator_test.cc
+++ b/gpu/command_buffer/client/fenced_allocator_test.cc
@@ -126,6 +126,14 @@ TEST_F(FencedAllocatorTest, TestBasic) {
   EXPECT_TRUE(allocator_->CheckConsistency());
 }
 
+// Test alloc 0 fails.
+TEST_F(FencedAllocatorTest, TestAllocZero) {
+  FencedAllocator::Offset offset = allocator_->Alloc(0);
+  EXPECT_EQ(FencedAllocator::kInvalidOffset, offset);
+  EXPECT_FALSE(allocator_->InUse());
+  EXPECT_TRUE(allocator_->CheckConsistency());
+}
+
 // Checks out-of-memory condition.
 TEST_F(FencedAllocatorTest, TestOutOfMemory) {
   EXPECT_TRUE(allocator_->CheckConsistency());
@@ -446,6 +454,15 @@ TEST_F(FencedAllocatorWrapperTest, TestBasic) {
   allocator_->Free(pointer_uint);
 }
 
+// Test alloc 0 fails.
+TEST_F(FencedAllocatorWrapperTest, TestAllocZero) {
+  allocator_->CheckConsistency();
+
+  void *pointer = allocator_->Alloc(0);
+  ASSERT_FALSE(pointer);
+  EXPECT_TRUE(allocator_->CheckConsistency());
+}
+
 // Checks out-of-memory condition.
 TEST_F(FencedAllocatorWrapperTest, TestOutOfMemory) {
   allocator_->CheckConsistency();