dawn: Remove semicolons.

A cleanup needed for turning on -Wextra-semi in Chromium builds.

Bug: chromium:926235
Change-Id: I3d2b517ad21dfae9e7dc06613a7fe3e98d783b2a
Reviewed-on: https://dawn-review.googlesource.com/c/4841
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

src/fuzzers/DawnWireServerAndFrontendFuzzer.cpp

@@ -29,7 +29,7 @@ class DevNull : public dawn_wire::CommandSerializer {
     }
     bool Flush() override {
         return true;
-    };
+    }
 
   private:
     std::vector<char> buf;

src/tests/end2end/BindGroupTests.cpp

@@ -467,4 +467,4 @@ TEST_P(BindGroupTests, DrawTwiceInSamePipelineWithFourBindGroupSets)
     EXPECT_PIXEL_RGBA8_EQ(notFilled, renderPass.color, max, max);
 }
 
-DAWN_INSTANTIATE_TEST(BindGroupTests, D3D12Backend, MetalBackend, OpenGLBackend, VulkanBackend);
+DAWN_INSTANTIATE_TEST(BindGroupTests, D3D12Backend, MetalBackend, OpenGLBackend, VulkanBackend)

src/tests/unittests/validation/ValidationTest.h

@@ -21,7 +21,7 @@
 
 namespace dawn_native {
     class Instance;
-};
+}
 
 #define ASSERT_DEVICE_ERROR(statement) \
     StartExpectDeviceError(); \