Expose GLES2Interface to blink, and delete isContextLost() from WGC3D.

third_party/WebKit/Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'ContentDecryptionModuleResult.h',
@@ skipping 1212 matching lines @@
     # NOTE: These are legacy unit tests and tests that require a Platform
     # object. Do not add more unless the test requires a Platform object.
     # These tests are a part of the web:webkit_unit_tests binary.
     'platform_web_unittest_files': [
       'graphics/Canvas2DLayerBridgeTest.cpp',
       'graphics/DeferredImageDecoderTest.cpp',
       'graphics/GraphicsLayerTest.cpp',
       'graphics/ImageDecodingStoreTest.cpp',
       'graphics/ImageFrameGeneratorTest.cpp',
       'graphics/ImageLayerChromiumTest.cpp',
+      'graphics/test/MockGLES2Interface.h',
       'graphics/test/MockImageDecoder.h',
       'graphics/test/MockWebGraphicsContext3D.h',
       'threading/BackgroundTaskRunnerTest.cpp',
     ],
     'platform_test_support_files': [
       'graphics/test/FakeGraphicsLayerFactory.cpp',
       'graphics/test/FakeGraphicsLayerFactory.h',
       'testing/FontTestHelpers.cpp',
       'testing/FontTestHelpers.h',
       'testing/GeometryPrinters.cpp',
@@ skipping 40 matching lines @@
       ['OS!="mac"',
         {
           'platform_test_files': [
             'scroll/ScrollAnimatorTest.cpp',
           ],
         }
       ],
     ],
   },
 }