Change glimage to accept a type.

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 77a846fe8c1b801b54ac84f2cc87e6df378c42c2..5d38fa7b0ef1036550021136cced2f7444266290 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl.cc
@@ -28,6 +28,16 @@ bool GpuMemoryBufferImpl::IsFormatValid(unsigned internalformat) {
 }
 
 // static
+bool GpuMemoryBufferImpl::IsUsageValid(unsigned usage) {
+  switch (usage) {
+    case GL_IMAGE_MAP_CHROMIUM:

[reveman, 2014/05/01 15:15:55]

Please include SCANOUT here.

Each specific implementation should have a static IsUsageSupported function that
prevents allocation of buffers with unsupported usage mode.

+      return true;
+    default:
+      return false;
+  }
+}
+
+// static
 size_t GpuMemoryBufferImpl::BytesPerPixel(unsigned internalformat) {
   switch (internalformat) {
     case GL_BGRA8_EXT: