Moved GL enums from GraphicsContext3D to a more generic location.

Source/core/platform/graphics/Canvas2DLayerBridge.cpp

Index: Source/core/platform/graphics/Canvas2DLayerBridge.cpp
diff --git a/Source/core/platform/graphics/Canvas2DLayerBridge.cpp b/Source/core/platform/graphics/Canvas2DLayerBridge.cpp
index f7e911ca33b2d907134986ca2b647367234e92f9..1193e898f1f4b0e401bdd536870be92b11f1e278 100644
--- a/Source/core/platform/graphics/Canvas2DLayerBridge.cpp
+++ b/Source/core/platform/graphics/Canvas2DLayerBridge.cpp
@@ -322,15 +322,15 @@ bool Canvas2DLayerBridge::prepareMailbox(blink::WebExternalTextureMailbox* outMa
     ASSERT(mailboxInfo->m_image.get());
     ASSERT(mailboxInfo->m_image->getTexture());
 
-    m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, mailboxInfo->m_image->getTexture()->getTextureHandle());
-    m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
-    m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
-    m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
-    m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
-    context()->produceTextureCHROMIUM(GraphicsContext3D::TEXTURE_2D, mailboxInfo->m_mailbox.name);
+    m_context->bindTexture(GL_TEXTURE_2D, mailboxInfo->m_image->getTexture()->getTextureHandle());
+    m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    context()->produceTextureCHROMIUM(GL_TEXTURE_2D, mailboxInfo->m_mailbox.name);
     context()->flush();
     mailboxInfo->m_mailbox.syncPoint = context()->insertSyncPoint();
-    m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, 0);
+    m_context->bindTexture(GL_TEXTURE_2D, 0);
     // Because we are changing the texture binding without going through skia,
     // we must dirty the context.
     m_context->grContext()->resetContext(kTextureBinding_GrGLBackendState);