Fixup whitespace/comments issues.

This CL fixes a few tabs to be spaces which makes the whitespace/comments
lint check pass. The check is set to enabled.

Change-Id: I2a6c590aa3bfee888239adc89d1ce4c8c99f3e78
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86083
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index c54ff29..4cb8b9e 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -77,7 +77,7 @@
     "-legal/copyright", "-readability/braces", "-readability/casting",
     "-readability/inheritance", "-readability/namespace", "-runtime/explicit",
     "-runtime/indentation_namespace", "-runtime/int", "-runtime/printf",
-    "-whitespace/comments", "-whitespace/empty_if_body"
+    "-whitespace/empty_if_body"
 ]
 
 
diff --git a/include/dawn/native/MetalBackend.h b/include/dawn/native/MetalBackend.h
index 6db34a1..54b01ce 100644
--- a/include/dawn/native/MetalBackend.h
+++ b/include/dawn/native/MetalBackend.h
@@ -30,7 +30,7 @@
 
 #ifdef __OBJC__
 #    import <Metal/Metal.h>
-#endif  //__OBJC__
+#endif  // __OBJC__
 
 namespace dawn::native::metal {
 
diff --git a/src/dawn/tests/unittests/validation/ResourceUsageTrackingTests.cpp b/src/dawn/tests/unittests/validation/ResourceUsageTrackingTests.cpp
index b19e423..6fb5541 100644
--- a/src/dawn/tests/unittests/validation/ResourceUsageTrackingTests.cpp
+++ b/src/dawn/tests/unittests/validation/ResourceUsageTrackingTests.cpp
@@ -1690,9 +1690,9 @@
 
     // TODO (yunchao.he@intel.com):
     //
-    //	* Add tests for multiple encoders upon the same resource simultaneously. This situation fits
-    //	some cases like VR, multi-threading, etc.
+    //  * Add tests for multiple encoders upon the same resource simultaneously. This situation fits
+    //    some cases like VR, multi-threading, etc.
     //
-    //	* Add tests for bundle
+    //  * Add tests for bundle
 
 }  // anonymous namespace
diff --git a/src/dawn/tests/unittests/validation/TextureSubresourceTests.cpp b/src/dawn/tests/unittests/validation/TextureSubresourceTests.cpp
index 428777c..5834863 100644
--- a/src/dawn/tests/unittests/validation/TextureSubresourceTests.cpp
+++ b/src/dawn/tests/unittests/validation/TextureSubresourceTests.cpp
@@ -134,11 +134,11 @@
     }
 
     // TODO (yunchao.he@intel.com):
-    //	* Add tests for compute, in which texture subresource is traced per dispatch.
+    //  * Add tests for compute, in which texture subresource is traced per dispatch.
     //
-    //	* Add tests for multiple encoders upon the same resource simultaneously. This situation fits
-    //	some cases like VR, multi-threading, etc.
+    //  * Add tests for multiple encoders upon the same resource simultaneously. This situation fits
+    //    some cases like VR, multi-threading, etc.
     //
-    //	* Add tests for conflicts between usages in two render bundles used in the same pass.
+    //  * Add tests for conflicts between usages in two render bundles used in the same pass.
 
 }  // anonymous namespace
diff --git a/src/dawn/tests/white_box/QueryInternalShaderTests.cpp b/src/dawn/tests/white_box/QueryInternalShaderTests.cpp
index 96d3b2f..d888b25 100644
--- a/src/dawn/tests/white_box/QueryInternalShaderTests.cpp
+++ b/src/dawn/tests/white_box/QueryInternalShaderTests.cpp
@@ -181,16 +181,16 @@
     }
 };
 
-// Test the accuracy of timestamp compute shader which uses unsigned 32-bit integers to simulate
-// unsigned 64-bit integers (timestamps) multiplied by float (period).
-// The arguments pass to timestamp internal pipeline:
-// - The timestamps buffer contains the original timestamps resolved from query set (created
+// Test the accuracy of timestamp compute shader which uses unsigned 32-bit integers to simulate
+// unsigned 64-bit integers (timestamps) multiplied by float (period).
+// The arguments pass to timestamp internal pipeline:
+// - The timestamps buffer contains the original timestamps resolved from query set (created
 //   manually here), and will be used to store the results processed by the compute shader.
 //   Expect 0 for unavailable timestamps and nanoseconds for available timestamps in an expected
 //   error tolerance ratio.
-// - The availability buffer passes the data of which slot in timestamps buffer is an initialized
+// - The availability buffer passes the data of which slot in timestamps buffer is an initialized
 //   timestamp.
-// - The params buffer passes the timestamp count, the offset in timestamps buffer and the
+// - The params buffer passes the timestamp count, the offset in timestamps buffer and the
 //   timestamp period (here use GPU frequency (HZ) on Intel D3D12 to calculate the period in
 //   ns for testing).
 TEST_P(QueryInternalShaderTests, TimestampComputeShader) {