Add compositor support for half-float RGBA buffers and textures

gpu/command_buffer/service/feature_info.h

Index: gpu/command_buffer/service/feature_info.h
diff --git a/gpu/command_buffer/service/feature_info.h b/gpu/command_buffer/service/feature_info.h
index ab6c19a0aa285e2ed2a0091d242d27fb2c0e7940..1545e38ee3c90e17e7439d159c8f941c78712ded 100644
--- a/gpu/command_buffer/service/feature_info.h
+++ b/gpu/command_buffer/service/feature_info.h
@@ -32,67 +32,68 @@ class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
   struct FeatureFlags {
     FeatureFlags();
 
-    bool chromium_framebuffer_multisample;
-    bool chromium_sync_query;
+    bool chromium_framebuffer_multisample = false;
+    bool chromium_sync_query = false;
     // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
     // GL_EXT_framebuffer_multisample-style semantics, since they are exposed
     // as core GL functions on this implementation.
-    bool use_core_framebuffer_multisample;
-    bool multisampled_render_to_texture;
+    bool use_core_framebuffer_multisample = false;
+    bool multisampled_render_to_texture = false;
     // Use the IMG GLenum values and functions rather than EXT.
-    bool use_img_for_multisampled_render_to_texture;
-    bool chromium_screen_space_antialiasing;
-    bool use_chromium_screen_space_antialiasing_via_shaders;
-    bool oes_standard_derivatives;
-    bool oes_egl_image_external;
-    bool nv_egl_stream_consumer_external;
-    bool oes_depth24;
-    bool oes_compressed_etc1_rgb8_texture;
-    bool packed_depth24_stencil8;
-    bool npot_ok;
-    bool enable_texture_float_linear;
-    bool enable_texture_half_float_linear;
-    bool angle_translated_shader_source;
-    bool angle_pack_reverse_row_order;
-    bool arb_texture_rectangle;
-    bool angle_instanced_arrays;
-    bool occlusion_query;
-    bool occlusion_query_boolean;
-    bool use_arb_occlusion_query2_for_occlusion_query_boolean;
-    bool use_arb_occlusion_query_for_occlusion_query_boolean;
-    bool native_vertex_array_object;
-    bool ext_texture_format_astc;
-    bool ext_texture_format_atc;
-    bool ext_texture_format_bgra8888;
-    bool ext_texture_format_dxt1;
-    bool ext_texture_format_dxt5;
-    bool enable_shader_name_hashing;
-    bool enable_samplers;
-    bool ext_draw_buffers;
-    bool nv_draw_buffers;
-    bool ext_frag_depth;
-    bool ext_shader_texture_lod;
-    bool use_async_readpixels;
-    bool map_buffer_range;
-    bool ext_discard_framebuffer;
-    bool angle_depth_texture;
-    bool is_swiftshader;
-    bool angle_texture_usage;
-    bool ext_texture_storage;
-    bool chromium_path_rendering;
-    bool chromium_framebuffer_mixed_samples;
-    bool blend_equation_advanced;
-    bool blend_equation_advanced_coherent;
-    bool ext_texture_rg;
-    bool chromium_image_ycbcr_420v;
-    bool chromium_image_ycbcr_422;
-    bool emulate_primitive_restart_fixed_index;
-    bool ext_render_buffer_format_bgra8888;
-    bool ext_multisample_compatibility;
-    bool ext_blend_func_extended;
-    bool ext_read_format_bgra;
-    bool desktop_srgb_support;
-    bool arb_es3_compatibility;
+    bool use_img_for_multisampled_render_to_texture = false;
+    bool chromium_screen_space_antialiasing = false;
+    bool use_chromium_screen_space_antialiasing_via_shaders = false;
+    bool oes_standard_derivatives = false;
+    bool oes_egl_image_external = false;
+    bool nv_egl_stream_consumer_external = false;
+    bool oes_depth24 = false;
+    bool oes_compressed_etc1_rgb8_texture = false;
+    bool packed_depth24_stencil8 = false;
+    bool npot_ok = false;
+    bool enable_texture_float_linear = false;
+    bool enable_texture_half_float_linear = false;
+    bool enable_color_buffer_float = false;
+    bool angle_translated_shader_source = false;
+    bool angle_pack_reverse_row_order = false;
+    bool arb_texture_rectangle = false;
+    bool angle_instanced_arrays = false;
+    bool occlusion_query = false;
+    bool occlusion_query_boolean = false;
+    bool use_arb_occlusion_query2_for_occlusion_query_boolean = false;
+    bool use_arb_occlusion_query_for_occlusion_query_boolean = false;
+    bool native_vertex_array_object = false;
+    bool ext_texture_format_astc = false;
+    bool ext_texture_format_atc = false;
+    bool ext_texture_format_bgra8888 = false;
+    bool ext_texture_format_dxt1 = false;
+    bool ext_texture_format_dxt5 = false;
+    bool enable_shader_name_hashing = false;
+    bool enable_samplers = false;
+    bool ext_draw_buffers = false;
+    bool nv_draw_buffers = false;
+    bool ext_frag_depth = false;
+    bool ext_shader_texture_lod = false;
+    bool use_async_readpixels = false;
+    bool map_buffer_range = false;
+    bool ext_discard_framebuffer = false;
+    bool angle_depth_texture = false;
+    bool is_swiftshader = false;
+    bool angle_texture_usage = false;
+    bool ext_texture_storage = false;
+    bool chromium_path_rendering = false;
+    bool chromium_framebuffer_mixed_samples = false;
+    bool blend_equation_advanced = false;
+    bool blend_equation_advanced_coherent = false;
+    bool ext_texture_rg = false;
+    bool chromium_image_ycbcr_420v = false;
+    bool chromium_image_ycbcr_422 = false;
+    bool emulate_primitive_restart_fixed_index = false;
+    bool ext_render_buffer_format_bgra8888 = false;
+    bool ext_multisample_compatibility = false;
+    bool ext_blend_func_extended = false;
+    bool ext_read_format_bgra = false;
+    bool desktop_srgb_support = false;
+    bool arb_es3_compatibility = false;
     bool chromium_color_buffer_float_rgb = false;
     bool chromium_color_buffer_float_rgba = false;
     bool angle_robust_client_memory = false;