Assume float and half float formats are renderable on Android

except for RGB32F.

This is true since ES3 and most of Android devcies are on ES3+,
and histogram data confirmed this: 100% renderable for all formats,
except RGB32F, which is 99.99%+ unrenderable.

Avoid runtime check - this is a minor optimization in validating
command buffer on Android.

BUG=1127837
TEST=bots
R=kbr@chromium.org

Change-Id: I9ac1c0c87ae197d6883e9167068bd81fc4e0d844
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438313Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812305}

gpu/command_buffer/service/feature_info.cc

@@ -1823,7 +1823,8 @@ void FeatureInfo::InitializeFloatAndHalfFloatFeatures(
 
   if (may_enable_chromium_color_buffer_float &&
       !had_native_chromium_color_buffer_float_ext) {
-    if (workarounds_.force_enable_color_buffer_float) {
+    if (workarounds_.force_enable_color_buffer_float ||
+        workarounds_.force_enable_color_buffer_float_except_rgb32f) {
       if (enable_es3)
         enable_ext_color_buffer_float = true;
       if (IsWebGL1OrES2Context() && !enable_ext_color_buffer_half_float &&
@@ -1833,9 +1834,11 @@ void FeatureInfo::InitializeFloatAndHalfFloatFeatures(
       feature_flags_.chromium_color_buffer_float_rgba = true;
       if (!disallowed_features_.chromium_color_buffer_float_rgba)
         EnableCHROMIUMColorBufferFloatRGBA();
-      feature_flags_.chromium_color_buffer_float_rgb = true;
-      if (!disallowed_features_.chromium_color_buffer_float_rgb)
-        EnableCHROMIUMColorBufferFloatRGB();
+      if (!workarounds_.force_enable_color_buffer_float_except_rgb32f) {
+        feature_flags_.chromium_color_buffer_float_rgb = true;
+        if (!disallowed_features_.chromium_color_buffer_float_rgb)
+          EnableCHROMIUMColorBufferFloatRGB();
+      }
     } else {
       static_assert(
           GL_RGBA32F_ARB == GL_RGBA32F && GL_RGBA32F_EXT == GL_RGBA32F &&

gpu/config/gpu_driver_bug_list.json

@@ -3628,6 +3628,17 @@
       "features": [
         "force_enable_color_buffer_float"
       ]
+    },
+    {
+      "id": 358,
+      "cr_bugs": [1127387],
+      "description": "Always assume float formats are renderable on Android except RGB32F",
+      "os": {
+        "type": "android"
+      },
+      "features": [
+        "force_enable_color_buffer_float_except_rgb32f"
+      ]
     }
   ]
 }

gpu/config/gpu_workaround_list.txt

@@ -69,6 +69,7 @@ flush_on_framebuffer_change
 force_cube_complete
 force_cube_map_positive_x_allocation
 force_enable_color_buffer_float
+force_enable_color_buffer_float_except_rgb32f
 force_gl_flush_on_swap_buffers
 force_high_performance_gpu
 force_int_or_srgb_cube_texture_complete