Crash the gpu process when it cannot allocate shared memory.

Bug: 835628
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel
Change-Id: I06c983e2e12b804a3fd31ef909917c30d6cf1b06
Reviewed-on: https://chromium-review.googlesource.com/1027801
Commit-Queue: Ria Jiang <riajiang@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553813}

components/viz/service/hit_test/hit_test_aggregator.cc

@@ -69,19 +69,20 @@ void HitTestAggregator::AllocateHitTestRegionArray() {
 void HitTestAggregator::ResizeHitTestRegionArray(uint32_t size) {
   size_t num_bytes = size * sizeof(AggregatedHitTestRegion);
   write_handle_ = mojo::SharedBufferHandle::Create(num_bytes);
-  DCHECK(write_handle_.is_valid());
-  auto new_buffer_ = write_handle_->Map(num_bytes);
-  DCHECK(new_buffer_);
+  CHECK(write_handle_.is_valid()) << "Allocating shared memory failed.";
+  auto new_buffer = write_handle_->Map(num_bytes);
+  CHECK(new_buffer) << "Allocating shared memory failed.";
   handle_replaced_ = true;
 
-  AggregatedHitTestRegion* region = (AggregatedHitTestRegion*)new_buffer_.get();
+  AggregatedHitTestRegion* region =
+      static_cast<AggregatedHitTestRegion*>(new_buffer.get());
   if (write_size_)
     memcpy(region, write_buffer_.get(), write_size_);
   else
     region[0].child_count = kEndOfList;
 
   write_size_ = size;
-  write_buffer_ = std::move(new_buffer_);
+  write_buffer_ = std::move(new_buffer);
 }
 
 void HitTestAggregator::SwapHandles() {