sampleCoverage   3145 Source/core/html/canvas/WebGLRenderingContextBase.cpp     m_context->sampleCoverage(value, invert);
sampleCoverage    222 Source/core/html/canvas/WebGLRenderingContextBase.h     void sampleCoverage(GLfloat value, GLboolean invert);
sampleCoverage    183 Source/platform/graphics/test/MockWebGraphicsContext3D.h     virtual void sampleCoverage(WGC3Dclampf value, WGC3Dboolean invert) { }
sampleCoverage    305 public/platform/WebGraphicsContext3D.h     virtual void sampleCoverage(WGC3Dclampf value, WGC3Dboolean invert) = 0;