Revert of Add support for compressed GPU memory buffers.

gpu/command_buffer/service/image_factory.cc

Index: gpu/command_buffer/service/image_factory.cc
diff --git a/gpu/command_buffer/service/image_factory.cc b/gpu/command_buffer/service/image_factory.cc
index 1665c1eea85ce316866569cbfe3d6adf5bec27b1..0b740d8f32b47eb1e179be288abcb61ae2714b00 100644
--- a/gpu/command_buffer/service/image_factory.cc
+++ b/gpu/command_buffer/service/image_factory.cc
@@ -22,16 +22,6 @@
       return gfx::GpuMemoryBuffer::RGBX_8888;
     case GL_RGBA:
       return gfx::GpuMemoryBuffer::RGBA_8888;
-    case GL_ATC_RGB_AMD:
-      return gfx::GpuMemoryBuffer::ATC;
-    case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
-      return gfx::GpuMemoryBuffer::ATCIA;
-    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-      return gfx::GpuMemoryBuffer::DXT1;
-    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-      return gfx::GpuMemoryBuffer::DXT5;
-    case GL_ETC1_RGB8_OES:
-      return gfx::GpuMemoryBuffer::ETC1;
     default:
       NOTREACHED();
       return gfx::GpuMemoryBuffer::RGBA_8888;
@@ -59,11 +49,6 @@
   switch (internalformat) {
     case GL_RGB:
       switch (format) {
-        case gfx::GpuMemoryBuffer::ATC:
-        case gfx::GpuMemoryBuffer::ATCIA:
-        case gfx::GpuMemoryBuffer::DXT1:
-        case gfx::GpuMemoryBuffer::DXT5:
-        case gfx::GpuMemoryBuffer::ETC1:
         case gfx::GpuMemoryBuffer::RGBX_8888:
           return true;
         case gfx::GpuMemoryBuffer::RGBA_8888:
@@ -76,11 +61,6 @@
       switch (format) {
         case gfx::GpuMemoryBuffer::RGBX_8888:
           return false;
-        case gfx::GpuMemoryBuffer::ATC:
-        case gfx::GpuMemoryBuffer::ATCIA:
-        case gfx::GpuMemoryBuffer::DXT1:
-        case gfx::GpuMemoryBuffer::DXT5:
-        case gfx::GpuMemoryBuffer::ETC1:
         case gfx::GpuMemoryBuffer::RGBA_8888:
         case gfx::GpuMemoryBuffer::BGRA_8888:
           return true;