Driver bug workaround: gl_clear_broken

Skia does not appear to use depth buffers and this appears to be
identical to ClearFramebufferResourceManager::ClearFramebuffer in
Chromium code.  Therefore, just hook up this workaround to turn
on these internal Skia workarounds.

Bug: chromium: 829614
Change-Id: Icc5f2eb981e39ffef487efa16940d2e50cdbc399
Reviewed-on: https://skia-review.googlesource.com/127220
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Adrienne Walker <enne@chromium.org>

include/gpu/GrDriverBugWorkaroundsAutogen.h

@@ -12,6 +12,8 @@
          disable_discard_framebuffer)     \
   GPU_OP(DISALLOW_LARGE_INSTANCED_DRAW,   \
          disallow_large_instanced_draw)   \
+  GPU_OP(GL_CLEAR_BROKEN,                 \
+         gl_clear_broken)                 \
   GPU_OP(MAX_MSAA_SAMPLE_COUNT_4,         \
          max_msaa_sample_count_4)         \
   GPU_OP(MAX_TEXTURE_SIZE_LIMIT_4096,     \

src/gpu/gl/GrGLCaps.cpp

@@ -2450,6 +2450,11 @@ void GrGLCaps::applyDriverCorrectnessWorkarounds(const GrGLContextInfo& ctxInfo,
         fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO = true;
     }
 
+    if (fDriverBugWorkarounds.gl_clear_broken) {
+        fUseDrawToClearColor = true;
+        fUseDrawToClearStencilClip = true;
+    }
+
     // This was reproduced on the following configurations:
     // - A Galaxy J5 (Adreno 306) running Android 6 with driver 140.0
     // - A Nexus 7 2013 (Adreno 320) running Android 5 with driver 104.0

src/gpu/gpu_workaround_list.txt

@@ -1,6 +1,7 @@
 disable_blend_equation_advanced
 disable_discard_framebuffer
 disallow_large_instanced_draw
+gl_clear_broken
 max_msaa_sample_count_4
 max_texture_size_limit_4096
 restore_scissor_on_fbo_change