Request compressed texture extensions when initializing WebGL extension modules

These extensions were being exposed as requestable but failing to
initialize because they weren't requested.

BUG=angleproject:3675
BUG=983142

Change-Id: I7b8be3c49860bac5c62cb5df6cfb77f1ecf120b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1698643
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#677052}

content/test/gpu/gpu_tests/test_expectations/webgl_conformance_expectations.txt

@@ -552,7 +552,6 @@ crbug.com/906724 [ android opengles ] conformance/textures/video/tex-2d-luminanc
 
 # Misc failures
 crbug.com/angleproject/2988 [ android opengles ] conformance/context/context-size-change.html [ Failure ]
-crbug.com/angleproject/1552 [ android opengles ] WebglExtension_WEBGL_compressed_texture_etc1 [ Failure ]
 
 ############
 # ChromeOS #

third_party/blink/renderer/modules/webgl/webgl_compressed_texture_astc.cc

@@ -29,6 +29,9 @@ const WebGLCompressedTextureASTC::BlockSizeCompressASTC
 WebGLCompressedTextureASTC::WebGLCompressedTextureASTC(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_KHR_texture_compression_astc_ldr");
+
   const int kAlphaFormatGap =
       GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR - GL_COMPRESSED_RGBA_ASTC_4x4_KHR;
 

third_party/blink/renderer/modules/webgl/webgl_compressed_texture_etc1.cc

@@ -11,6 +11,9 @@ namespace blink {
 WebGLCompressedTextureETC1::WebGLCompressedTextureETC1(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_OES_compressed_ETC1_RGB8_texture");
+
   context->AddCompressedTextureFormat(GL_ETC1_RGB8_OES);
 }
 

third_party/blink/renderer/modules/webgl/webgl_compressed_texture_pvrtc.cc

@@ -32,6 +32,9 @@ namespace blink {
 WebGLCompressedTexturePVRTC::WebGLCompressedTexturePVRTC(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_IMG_texture_compression_pvrtc");
+
   context->AddCompressedTextureFormat(GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG);
   context->AddCompressedTextureFormat(GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG);
   context->AddCompressedTextureFormat(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG);

third_party/blink/renderer/modules/webgl/webgl_compressed_texture_s3tc.cc

@@ -32,6 +32,15 @@ namespace blink {
 WebGLCompressedTextureS3TC::WebGLCompressedTextureS3TC(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_EXT_texture_compression_s3tc");
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_ANGLE_texture_compression_dxt1");
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_ANGLE_texture_compression_dxt3");
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_ANGLE_texture_compression_dxt5");
+
   context->AddCompressedTextureFormat(GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
   context->AddCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
   context->AddCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT);

third_party/blink/renderer/modules/webgl/webgl_compressed_texture_s3tc_srgb.cc

@@ -11,6 +11,9 @@ namespace blink {
 WebGLCompressedTextureS3TCsRGB::WebGLCompressedTextureS3TCsRGB(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
+  context->ExtensionsUtil()->EnsureExtensionEnabled(
+      "GL_EXT_texture_compression_s3tc_srgb");
+
   // TODO(kainino): update these with _EXT versions once
   // GL_EXT_compressed_texture_s3tc_srgb is ratified
   context->AddCompressedTextureFormat(GL_COMPRESSED_SRGB_S3TC_DXT1_NV);