Implement the texture uploading of ASTC compression for WebGL

content/common/gpu/client/gpu_memory_buffer_impl.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl.cc b/content/common/gpu/client/gpu_memory_buffer_impl.cc
index 5d2350af8f6d46625289f5bc18faf52fdfe8bf35..aef00669a0d0e0ba279989a23edcbce380c2c616 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl.cc
@@ -82,6 +82,7 @@ GpuMemoryBufferImpl* GpuMemoryBufferImpl::FromClientBuffer(
 size_t GpuMemoryBufferImpl::NumberOfPlanesForGpuMemoryBufferFormat(
     Format format) {
   switch (format) {
+    case ASTC:
     case ATC:
     case ATCIA:
     case DXT1:
@@ -103,6 +104,7 @@ size_t GpuMemoryBufferImpl::NumberOfPlanesForGpuMemoryBufferFormat(
 // static
 size_t GpuMemoryBufferImpl::SubsamplingFactor(Format format, int plane) {
   switch (format) {
+    case ASTC:
     case ATC:
     case ATCIA:
     case DXT1:
@@ -136,6 +138,7 @@ bool GpuMemoryBufferImpl::RowSizeInBytes(size_t width,
       DCHECK_EQ(plane, 0);
       *size_in_bytes = width;
       return true;
+    case ASTC:
     case ATC:
     case DXT1:
     case ETC1: