Add a gl::AttribArray helper type.

src/libANGLE/angletypes.h

@@ -310,6 +310,9 @@ using AttachmentArray = std::array<T, IMPLEMENTATION_MAX_FRAMEBUFFER_ATTACHMENTS
 template <typename T>
 using DrawBuffersArray = std::array<T, IMPLEMENTATION_MAX_DRAW_BUFFERS>;
 
+template <typename T>
+using AttribArray = std::array<T, MAX_VERTEX_ATTRIBS>;
+
 }  // namespace gl
 
 namespace rx

src/libANGLE/renderer/d3d/RendererD3D.h

@@ -96,7 +96,7 @@ class BufferFactoryD3D : angle::NonCopyable
         GLsizei instances) const = 0;
 };
 
-using AttribIndexArray = std::array<int, gl::MAX_VERTEX_ATTRIBS>;
+using AttribIndexArray = gl::AttribArray<int>;
 
 class RendererD3D : public BufferFactoryD3D, public MultisampleTextureInitializer
 {

src/libANGLE/renderer/d3d/d3d11/InputLayoutCache.cpp

@@ -399,7 +399,7 @@ gl::Error InputLayoutCache::createInputLayout(
         programD3D->usesPointSize() && programD3D->usesInstancedPointSpriteEmulation();
 
     unsigned int inputElementCount = 0;
-    std::array<D3D11_INPUT_ELEMENT_DESC, gl::MAX_VERTEX_ATTRIBS> inputElements;
+    gl::AttribArray<D3D11_INPUT_ELEMENT_DESC> inputElements;
 
     for (size_t attribIndex = 0; attribIndex < currentAttributes.size(); ++attribIndex)
     {

src/libANGLE/renderer/d3d/d3d11/InputLayoutCache.h

@@ -49,7 +49,7 @@ struct PackedAttributeLayout
 
     uint32_t numAttributes;
     uint32_t flags;
-    std::array<uint32_t, gl::MAX_VERTEX_ATTRIBS> attributeData;
+    gl::AttribArray<uint32_t> attributeData;
 };
 }  // namespace rx
 

src/libANGLE/renderer/d3d/d3d11/StateManager11.h

@@ -478,9 +478,9 @@ class StateManager11 final : angle::NonCopyable
 
     // Current applied vertex states.
     // TODO(jmadill): Figure out how to use ResourceSerial here.
-    std::array<ID3D11Buffer *, gl::MAX_VERTEX_ATTRIBS> mCurrentVertexBuffers;
-    std::array<UINT, gl::MAX_VERTEX_ATTRIBS> mCurrentVertexStrides;
-    std::array<UINT, gl::MAX_VERTEX_ATTRIBS> mCurrentVertexOffsets;
+    gl::AttribArray<ID3D11Buffer *> mCurrentVertexBuffers;
+    gl::AttribArray<UINT> mCurrentVertexStrides;
+    gl::AttribArray<UINT> mCurrentVertexOffsets;
     gl::RangeUI mDirtyVertexBufferRange;
 
     // Currently applied primitive topology