Enable ClangTidy check modernize-make-unique.

The majority of existing call sites were automatically updated using
clang-tidy -fix. A small handful required a manual update,
e.g. CppCodeGen.

This check is a bit lenient, and in particular will not flag cases like
`std::unique_ptr<Base>(new Derived())` which is still pretty common
throughout our codebase. This CL does not attempt to replace all the
cases that ClangTidy does not flag.

Change-Id: I5eba48ef880e25d22de80f321a68c389ba769e36
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307459
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
diff --git a/src/gpu/vk/GrVkPipelineStateCache.cpp b/src/gpu/vk/GrVkPipelineStateCache.cpp
index 769ca1b..e2c3c04 100644
--- a/src/gpu/vk/GrVkPipelineStateCache.cpp
+++ b/src/gpu/vk/GrVkPipelineStateCache.cpp
@@ -121,7 +121,7 @@
         if (!pipelineState) {
             return nullptr;
         }
-        entry = fMap.insert(desc, std::unique_ptr<Entry>(new Entry(fGpu, pipelineState)));
+        entry = fMap.insert(desc, std::make_unique<Entry>(fGpu, pipelineState));
         return (*entry)->fPipelineState.get();
     }
     return (*entry)->fPipelineState.get();