Fix Metal includes breaking macOS local builds

Before this fix, skia (and thus Chrome) would fail to compile on macOS when the user (developer) had a case-sensitive file-system.

So I've replaced the incorrect includes of <metal/metal.h> by <Metal/Metal.h>

Change-Id: I6ebcc0f46608f6d840d80d18e5f5baf0744a7f16
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225776
Reviewed-by: Jim Van Verth <[email protected]>
Commit-Queue: Mike Klein <[email protected]>

Author: AaronO

AUTHORS

@@ -11,6 +11,7 @@
 #
 # Please keep the list sorted alphabetically.
 
+Aaron O'Mullan <[email protected]>
 ACCESS CO., LTD. <*@access-company.com>
 Amazon, Inc <*@amazon.com>
 Anthony Catel <[email protected]>

src/gpu/mtl/GrMtlBuffer.h

@@ -11,7 +11,7 @@
 #include "src/gpu/GrGpuBuffer.h"
 #include "src/gpu/mtl/GrMtlUniformHandler.h"
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 class GrMtlCaps;
 class GrMtlGpu;

src/gpu/mtl/GrMtlDepthStencil.h

@@ -8,7 +8,7 @@
 #ifndef GrMtlDepthStencil_DEFINED
 #define GrMtlDepthStencil_DEFINED
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 #include "include/gpu/GrTypes.h"
 #include "src/core/SkOpts.h"

src/gpu/mtl/GrMtlGpuCommandBuffer.h

@@ -13,7 +13,7 @@
 #include "src/gpu/GrOpFlushState.h"
 #include "src/gpu/mtl/GrMtlGpu.h"
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 typedef uint32_t GrColor;
 class GrMtlBuffer;

src/gpu/mtl/GrMtlPipelineState.h

@@ -14,7 +14,7 @@
 #include "src/gpu/mtl/GrMtlBuffer.h"
 #include "src/gpu/mtl/GrMtlPipelineStateDataManager.h"
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 class GrMtlGpu;
 class GrMtlPipelineStateDataManager;

src/gpu/mtl/GrMtlPipelineStateBuilder.h

@@ -15,7 +15,7 @@
 #include "src/gpu/mtl/GrMtlVaryingHandler.h"
 #include "src/sksl/SkSLCompiler.h"
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 class GrMtlGpu;
 class GrMtlPipelineState;

src/gpu/mtl/GrMtlResourceProvider.h

@@ -15,7 +15,7 @@
 #include "src/gpu/mtl/GrMtlPipelineStateBuilder.h"
 #include "src/gpu/mtl/GrMtlSampler.h"
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 class GrMtlGpu;
 class GrMtlCommandBuffer;

src/gpu/mtl/GrMtlSampler.h

@@ -8,7 +8,7 @@
 #ifndef GrMtlSampler_DEFINED
 #define GrMtlSampler_DEFINED
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 
 #include "src/core/SkOpts.h"
 #include <atomic>

tests/MtlBackendAllocationTest.mm

@@ -9,7 +9,7 @@
 #include "src/gpu/GrContextPriv.h"
 #include "tests/Test.h"
 
-#import <metal/metal.h>
+#import <Metal/Metal.h>
 #include "src/gpu/mtl/GrMtlCaps.h"
 
 // In BackendAllocationTest.cpp