Compat: Update maxInterStageShaderVariables = 15

This is the OpenGL ES 3.1 Limit

Author: greggman

src/webgpu/api/validation/render_pipeline/inter_stage.spec.ts

@@ -3,7 +3,7 @@ Interface matching between vertex and fragment shader validation for createRende
 `;
 
 import { makeTestGroup } from '../../../../common/framework/test_group.js';
-import { assert, range } from '../../../../common/util/util.js';
+import { range } from '../../../../common/util/util.js';
 
 import { CreateRenderPipelineValidationTest } from './common.js';
 
@@ -251,9 +251,6 @@ g.test('max_components_count,output')
 
     const numVec4 = Math.floor(numScalarComponents / 4);
     const numTrailingScalars = numScalarComponents % 4;
-    const numUserDefinedInterStageVariables = numTrailingScalars > 0 ? numVec4 + 1 : numVec4;
-
-    assert(numUserDefinedInterStageVariables <= t.device.limits.maxInterStageShaderVariables);
 
     const outputs = range(numVec4, i => `@location(${i}) vout${i}: vec4<f32>`);
     const inputs = range(numVec4, i => `@location(${i}) fin${i}: vec4<f32>`);
@@ -294,9 +291,6 @@ g.test('max_components_count,input')
 
     const numVec4 = Math.floor(numScalarComponents / 4);
     const numTrailingScalars = numScalarComponents % 4;
-    const numUserDefinedInterStageVariables = numTrailingScalars > 0 ? numVec4 + 1 : numVec4;
-
-    assert(numUserDefinedInterStageVariables <= t.device.limits.maxInterStageShaderVariables);
 
     const outputs = range(numVec4, i => `@location(${i}) vout${i}: vec4<f32>`);
     const inputs = range(numVec4, i => `@location(${i}) fin${i}: vec4<f32>`);

src/webgpu/capability_info.ts

@@ -689,7 +689,7 @@ const [kLimitInfoKeys, kLimitInfoDefaults, kLimitInfoData] =
   'maxVertexAttributes':                       [           ,        16,              16,                          ],
   'maxVertexBufferArrayStride':                [           ,      2048,            2048,                          ],
   'maxInterStageShaderComponents':             [           ,        60,              60,                          ],
-  'maxInterStageShaderVariables':              [           ,        16,              16,                          ],
+  'maxInterStageShaderVariables':              [           ,        16,              15,                          ],
 
   'maxColorAttachments':                       [           ,         8,               4,                          ],
   'maxColorAttachmentBytesPerSample':          [           ,        32,              32,                          ],