Adding Blink-side support for EXT_shader_texture_lod

Source/core/core.gypi

 {
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/AnimationPlayer.idl',
             'animation/TimedItem.idl',
             'animation/Timeline.idl',
             'animation/Timing.idl',
             'clipboard/DataTransfer.idl',
@@ skipping 203 matching lines @@
             'html/TextMetrics.idl',
             'html/TimeRanges.idl',
             'html/ValidityState.idl',
             'html/VoidCallback.idl',
             'html/canvas/ANGLEInstancedArrays.idl',
             'html/canvas/Canvas2DContextAttributes.idl',
             'html/canvas/CanvasGradient.idl',
             'html/canvas/CanvasPattern.idl',
             'html/canvas/CanvasRenderingContext2D.idl',
             'html/canvas/EXTFragDepth.idl',
+            'html/canvas/EXTShaderTextureLOD.idl',
             'html/canvas/EXTTextureFilterAnisotropic.idl',
             'html/canvas/OESElementIndexUint.idl',
             'html/canvas/OESStandardDerivatives.idl',
             'html/canvas/OESTextureFloat.idl',
             'html/canvas/OESTextureFloatLinear.idl',
             'html/canvas/OESTextureHalfFloat.idl',
             'html/canvas/OESTextureHalfFloatLinear.idl',
             'html/canvas/OESVertexArrayObject.idl',
             'html/canvas/Path2D.idl',
             'html/canvas/WebGLActiveInfo.idl',
@@ skipping 2255 matching lines @@
             'html/canvas/CanvasRenderingContext.cpp',
             'html/canvas/CanvasRenderingContext.h',
             'html/canvas/CanvasRenderingContext2D.cpp',
             'html/canvas/CanvasRenderingContext2D.h',
             'html/canvas/CanvasStyle.cpp',
             'html/canvas/CanvasStyle.h',
             'html/canvas/DataView.cpp',
             'html/canvas/DataView.h',
             'html/canvas/EXTFragDepth.cpp',
             'html/canvas/EXTFragDepth.h',
+            'html/canvas/EXTShaderTextureLOD.cpp',
+            'html/canvas/EXTShaderTextureLOD.h',
             'html/canvas/EXTTextureFilterAnisotropic.cpp',
             'html/canvas/EXTTextureFilterAnisotropic.h',
             'html/canvas/OESElementIndexUint.cpp',
             'html/canvas/OESElementIndexUint.h',
             'html/canvas/OESStandardDerivatives.cpp',
             'html/canvas/OESStandardDerivatives.h',
             'html/canvas/OESTextureFloat.cpp',
             'html/canvas/OESTextureFloat.h',
             'html/canvas/OESTextureFloatLinear.cpp',
             'html/canvas/OESTextureFloatLinear.h',
@@ skipping 860 matching lines @@
             'html/track/vtt/BufferedLineReaderTest.cpp',
             'html/track/vtt/VTTScannerTest.cpp',
             'rendering/RenderOverflowTest.cpp',
             'rendering/shapes/BoxShapeTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }