Implement support for rendering to 32-bit float textures on ES3

gpu/command_buffer/service/texture_manager.cc

Index: gpu/command_buffer/service/texture_manager.cc
diff --git a/gpu/command_buffer/service/texture_manager.cc b/gpu/command_buffer/service/texture_manager.cc
index 72d3b4c9681a51c7830d1dc3f1d303298889618a..e2a7896a82da030006a823c2796f2eb156d1f25d 100644
--- a/gpu/command_buffer/service/texture_manager.cc
+++ b/gpu/command_buffer/service/texture_manager.cc
@@ -1336,10 +1336,10 @@ bool TextureManager::ValidateTexImage2D(
         error_state, function_name, args.target, "target");
     return false;
   }
-  if (!validators->texture_format.IsValid(args.internal_format)) {
+  if (!validators->texture_internal_format.IsValid(args.internal_format)) {
     ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
         error_state, function_name, args.internal_format,
-        "internal_format");
+        "internalformat");
     return false;
   }
   if (!validators->texture_format.IsValid(args.format)) {
@@ -1352,10 +1352,12 @@ bool TextureManager::ValidateTexImage2D(
         error_state, function_name, args.type, "type");
     return false;
   }
-  if (args.format != args.internal_format) {
+  if (args.format != args.internal_format &&
+      !((args.internal_format == GL_RGBA32F && args.format == GL_RGBA) ||
+        (args.internal_format == GL_RGB32F && args.format == GL_RGB))) {
     ERRORSTATE_SET_GL_ERROR(
         error_state, GL_INVALID_OPERATION, function_name,
-        "format != internalFormat");
+        "format != internalformat");
     return false;
   }
   if (!ValidateTextureParameters(
@@ -1396,7 +1398,7 @@ bool TextureManager::ValidateTexImage2D(
   // They both use the same MemoryTracker, and this call just re-routes
   // to it.
   if (!memory_tracker_managed_->EnsureGPUMemoryAvailable(args.pixels_size)) {
-    ERRORSTATE_SET_GL_ERROR(error_state, GL_OUT_OF_MEMORY, "glTexImage2D",
+    ERRORSTATE_SET_GL_ERROR(error_state, GL_OUT_OF_MEMORY, function_name,
                             "out of memory");
     return false;
   }