Adding support for PVRTC, ATC, and ETC1 textures to the command buffer

gpu/command_buffer/service/feature_info.cc

Index: gpu/command_buffer/service/feature_info.cc
diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index b488318687aa8e0f49e8c5199193548d2332c183..72bcbd46b2076fc5fee224e18969755cb4ce60da 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -618,6 +618,28 @@ void FeatureInfo::InitializeFeatures() {
     validators_.compressed_texture_format.AddValue(GL_ETC1_RGB8_OES);
   }
 
+  if (extensions.Contains("GL_AMD_compressed_ATC_texture")) {
+    AddExtensionString("GL_AMD_compressed_ATC_texture");
+    validators_.compressed_texture_format.AddValue(
+        GL_ATC_RGB_AMD);
+    validators_.compressed_texture_format.AddValue(
+        GL_ATC_RGBA_EXPLICIT_ALPHA_AMD);
+    validators_.compressed_texture_format.AddValue(
+        GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD);
+  }
+
+  if (extensions.Contains("GL_IMG_texture_compression_pvrtc")) {
+    AddExtensionString("GL_IMG_texture_compression_pvrtc");
+    validators_.compressed_texture_format.AddValue(
+        GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG);
+    validators_.compressed_texture_format.AddValue(
+        GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG);
+    validators_.compressed_texture_format.AddValue(
+        GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG);
+    validators_.compressed_texture_format.AddValue(
+        GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG);
+  }
+
   // Ideally we would only expose this extension on Mac OS X, to
   // support GL_CHROMIUM_iosurface and the compositor. We don't want
   // applications to start using it; they should use ordinary non-