Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/core.gypi

 {
     'variables': {
         'deprecated_perl_core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSKeyframeRule.idl',
@@ skipping 203 matching lines @@
             'html/canvas/WebGLCompressedTexturePVRTC.idl',
             'html/canvas/WebGLCompressedTextureS3TC.idl',
             'html/canvas/WebGLContextAttributes.idl',
             'html/canvas/WebGLContextEvent.idl',
             'html/canvas/WebGLDebugRendererInfo.idl',
             'html/canvas/WebGLDebugShaders.idl',
             'html/canvas/WebGLDepthTexture.idl',
             'html/canvas/WebGLDrawBuffers.idl',
             'html/canvas/WebGLLoseContext.idl',
             'html/canvas/WebGLRenderingContext.idl',
+            'html/canvas/WebGLRenderingContextBase.idl',
             'html/canvas/WebGLShaderPrecisionFormat.idl',
             'html/ime/Composition.idl',
             'html/ime/InputMethodContext.idl',
             'html/shadow/HTMLContentElement.idl',
             'html/shadow/HTMLShadowElement.idl',
             'html/track/TextTrack.idl',
             'html/track/TextTrackCue.idl',
             'html/track/TextTrackCueList.idl',
             'html/track/TextTrackList.idl',
             'html/track/TrackEvent.idl',
@@ skipping 2193 matching lines @@
             'html/canvas/WebGLLoseContext.cpp',
             'html/canvas/WebGLLoseContext.h',
             'html/canvas/WebGLObject.cpp',
             'html/canvas/WebGLObject.h',
             'html/canvas/WebGLProgram.cpp',
             'html/canvas/WebGLProgram.h',
             'html/canvas/WebGLRenderbuffer.cpp',
             'html/canvas/WebGLRenderbuffer.h',
             'html/canvas/WebGLRenderingContext.cpp',
             'html/canvas/WebGLRenderingContext.h',
+            'html/canvas/WebGLRenderingContextBase.cpp',
+            'html/canvas/WebGLRenderingContextBase.h',
             'html/canvas/WebGLShader.cpp',
             'html/canvas/WebGLShader.h',
             'html/canvas/WebGLShaderPrecisionFormat.cpp',
             'html/canvas/WebGLShaderPrecisionFormat.h',
             'html/canvas/WebGLSharedObject.cpp',
             'html/canvas/WebGLSharedObject.h',
             'html/canvas/WebGLTexture.cpp',
             'html/canvas/WebGLTexture.h',
             'html/canvas/WebGLUniformLocation.cpp',
             'html/canvas/WebGLUniformLocation.h',
@@ skipping 1440 matching lines @@
                 'bison_exe': 'bison',
                 # We specify a preprocess so it happens locally and won't get
                 # distributed to goma.
                 # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to
                 # use /usr/bin/clang once we require Xcode 4.x.
                 'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
               }],
          ],
     }
 }