Cleanup various clang warnings, use unique_ptrs in several places

Change-Id: I347904b25e51fcc7de14b1e72f1acd0f6ba26f3f
diff --git a/libs/hwui/Patch.h b/libs/hwui/Patch.h
index 1af4bb7..ea8c8c2 100644
--- a/libs/hwui/Patch.h
+++ b/libs/hwui/Patch.h
@@ -40,14 +40,13 @@
 class Patch {
 public:
     Patch();
-    ~Patch();
 
     /**
      * Returns the size of this patch's mesh in bytes.
      */
     uint32_t getSize() const;
 
-    TextureVertex* vertices;
+    std::unique_ptr<TextureVertex[]> vertices;
     uint32_t verticesCount;
     uint32_t indexCount;
     bool hasEmptyQuads;