GPU workaround to simulate Out of Memory errors with large textures

BUG=445542

Review URL: https://codereview.chromium.org/1050043003

Cr-Commit-Position: refs/heads/master@{#324150}

gpu/command_buffer/service/gles2_cmd_decoder.cc

@@ -9072,6 +9072,15 @@ error::Error GLES2DecoderImpl::HandleTexImage2D(uint32 immediate_data_size,
     }
   }
 
+  // For testing only. Allows us to stress the ability to respond to OOM errors.
+  if (workarounds().simulate_out_of_memory_on_large_textures &&
+      (width * height >= 4096 * 4096)) {
+    LOCAL_SET_GL_ERROR(
+        GL_OUT_OF_MEMORY,
+        "glTexImage2D", "synthetic out of memory");
+    return error::kNoError;
+  }
+
   TextureManager::DoTextImage2DArguments args = {
     target, level, internal_format, width, height, border, format, type,
     pixels, pixels_size};

gpu/config/gpu_driver_bug_workaround_type.h

@@ -100,6 +100,8 @@
          scalarize_vec_and_mat_constructor_args)             \
   GPU_OP(SET_TEXTURE_FILTER_BEFORE_GENERATING_MIPMAP,        \
          set_texture_filter_before_generating_mipmap)        \
+  GPU_OP(SIMULATE_OUT_OF_MEMORY_ON_LARGE_TEXTURES,           \
+         simulate_out_of_memory_on_large_textures)           \
   GPU_OP(SWIZZLE_RGBA_FOR_ASYNC_READPIXELS,                  \
          swizzle_rgba_for_async_readpixels)                  \
   GPU_OP(TEXSUBIMAGE2D_FASTER_THAN_TEXIMAGE2D,               \