gpu: Add disable_blend_equation_advanced workaround for Adreno 4xx.

Use of GL_KHR_blend_equation_advance blends for GPU compositing results
in severe graphical corruption.

This workaround disables the extension on Android, Adreno 4xx GPUs.

BUG=488485

Review URL: https://codereview.chromium.org/1154953004

Cr-Commit-Position: refs/heads/master@{#331220}
(cherry picked from commit 76d0b5d711b3292aecbd04a388ebd2d7d221385d)

Review URL: https://codereview.chromium.org/1161553009

Cr-Commit-Position: refs/branch-heads/2403@{#105}
Cr-Branched-From: f54b8097a9c45ed4ad308133d49f05325d6c5070-refs/heads/master@{#330231}
(cherry picked from commit 1ce683f8e8557740902fb396dedeefe3c45256ce)

Review URL: https://codereview.chromium.org/1158323006

(cherry picked from commit 103d7373a955befbb6501ede3c7bb877b1505ea0)

Cr-Original-Commit-Position: refs/branch-heads/2357_78@{#2}
Cr-Original-Branched-From: 59c2c8e04185c111e4feb57918d233fe8d869197-refs/branch-heads/2357@{#424}
Cr-Original-Branched-From: 59d4494849b405682265ed5d3f5164573b9a939b-refs/heads/master@{#323860}
Cr-Commit-Position: refs/branch-heads/2357@{#455}
Cr-Branched-From: 59d4494849b405682265ed5d3f5164573b9a939b-refs/heads/master@{#323860}

4 files changed, 62 insertions, 33 deletions

diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index 24fbfbe..ebc306e 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -1017,38 +1017,40 @@ void FeatureInfo::InitializeFeatures() {
     feature_flags_.chromium_sync_query = true;
   }
 
-  bool blend_equation_advanced_coherent =
-    extensions.Contains("GL_NV_blend_equation_advanced_coherent") ||
-    extensions.Contains("GL_KHR_blend_equation_advanced_coherent");
-
-  if (blend_equation_advanced_coherent ||
-      extensions.Contains("GL_NV_blend_equation_advanced") ||
-      extensions.Contains("GL_KHR_blend_equation_advanced")) {
-    const GLenum equations[] = {GL_MULTIPLY_KHR,
-                                GL_SCREEN_KHR,
-                                GL_OVERLAY_KHR,
-                                GL_DARKEN_KHR,
-                                GL_LIGHTEN_KHR,
-                                GL_COLORDODGE_KHR,
-                                GL_COLORBURN_KHR,
-                                GL_HARDLIGHT_KHR,
-                                GL_SOFTLIGHT_KHR,
-                                GL_DIFFERENCE_KHR,
-                                GL_EXCLUSION_KHR,
-                                GL_HSL_HUE_KHR,
-                                GL_HSL_SATURATION_KHR,
-                                GL_HSL_COLOR_KHR,
-                                GL_HSL_LUMINOSITY_KHR};
-
-    for (GLenum equation : equations)
-      validators_.equation.AddValue(equation);
-    if (blend_equation_advanced_coherent)
-      AddExtensionString("GL_KHR_blend_equation_advanced_coherent");
-
-    AddExtensionString("GL_KHR_blend_equation_advanced");
-    feature_flags_.blend_equation_advanced = true;
-    feature_flags_.blend_equation_advanced_coherent =
-      blend_equation_advanced_coherent;
+  if (!workarounds_.disable_blend_equation_advanced) {
+    bool blend_equation_advanced_coherent =
+        extensions.Contains("GL_NV_blend_equation_advanced_coherent") ||
+        extensions.Contains("GL_KHR_blend_equation_advanced_coherent");
+
+    if (blend_equation_advanced_coherent ||
+        extensions.Contains("GL_NV_blend_equation_advanced") ||
+        extensions.Contains("GL_KHR_blend_equation_advanced")) {
+      const GLenum equations[] = {GL_MULTIPLY_KHR,
+                                  GL_SCREEN_KHR,
+                                  GL_OVERLAY_KHR,
+                                  GL_DARKEN_KHR,
+                                  GL_LIGHTEN_KHR,
+                                  GL_COLORDODGE_KHR,
+                                  GL_COLORBURN_KHR,
+                                  GL_HARDLIGHT_KHR,
+                                  GL_SOFTLIGHT_KHR,
+                                  GL_DIFFERENCE_KHR,
+                                  GL_EXCLUSION_KHR,
+                                  GL_HSL_HUE_KHR,
+                                  GL_HSL_SATURATION_KHR,
+                                  GL_HSL_COLOR_KHR,
+                                  GL_HSL_LUMINOSITY_KHR};
+
+      for (GLenum equation : equations)
+        validators_.equation.AddValue(equation);
+      if (blend_equation_advanced_coherent)
+        AddExtensionString("GL_KHR_blend_equation_advanced_coherent");
+
+      AddExtensionString("GL_KHR_blend_equation_advanced");
+      feature_flags_.blend_equation_advanced = true;
+      feature_flags_.blend_equation_advanced_coherent =
+          blend_equation_advanced_coherent;
+    }
   }
 
   if (extensions.Contains("GL_NV_path_rendering")) {
diff --git a/gpu/command_buffer/service/feature_info_unittest.cc b/gpu/command_buffer/service/feature_info_unittest.cc
index f4b2dac..ac9ffa8 100644
--- a/gpu/command_buffer/service/feature_info_unittest.cc
+++ b/gpu/command_buffer/service/feature_info_unittest.cc
@@ -1386,6 +1386,18 @@ TEST_F(FeatureInfoTest, ARBSyncDisabled) {
   EXPECT_FALSE(gfx::GLFence::IsSupported());
 }
 
+TEST_F(FeatureInfoTest, BlendEquationAdvancedDisabled) {
+  base::CommandLine command_line(0, NULL);
+  command_line.AppendSwitchASCII(
+      switches::kGpuDriverBugWorkarounds,
+      base::IntToString(gpu::DISABLE_BLEND_EQUATION_ADVANCED));
+  SetupInitExpectationsWithCommandLine(
+      "GL_KHR_blend_equation_advanced_coherent GL_KHR_blend_equation_advanced",
+      command_line);
+  EXPECT_FALSE(info_->feature_flags().blend_equation_advanced);
+  EXPECT_FALSE(info_->feature_flags().blend_equation_advanced_coherent);
+}
+
 TEST_F(FeatureInfoTest, InitializeCHROMIUM_path_rendering) {
   SetupInitExpectationsWithGLVersion(
       "GL_ARB_compatibility GL_NV_path_rendering GL_EXT_direct_state_access",
diff --git a/gpu/config/gpu_driver_bug_list_json.cc b/gpu/config/gpu_driver_bug_list_json.cc
index f5d4a2f..ee7adbea 100644
--- a/gpu/config/gpu_driver_bug_list_json.cc
+++ b/gpu/config/gpu_driver_bug_list_json.cc
@@ -19,7 +19,7 @@ const char kGpuDriverBugListJson[] = LONG_STRING_CONST(
 {
   "name": "gpu driver bug list",
   // Please update the version number whenever you change this file.
-  "version": "8.06",
+  "version": "8.07",
   "entries": [
     {
       "id": 1,
@@ -1259,6 +1259,19 @@ LONG_STRING_CONST(
       "features": [
         "disable_egl_khr_wait_sync"
       ]
+    },
+    {
+      "id": 117,
+      "description": "GL_KHR_blend_equation_advanced breaks blending on Adreno 4xx",
+      "cr_bugs": [488485],
+      "os": {
+        "type": "android"
+      },
+      "gl_vendor": "Qualcomm.*",
+      "gl_renderer": ".*4\\d\\d",
+      "features": [
+        "disable_blend_equation_advanced"
+      ]
     }
   ]
 }
diff --git a/gpu/config/gpu_driver_bug_workaround_type.h b/gpu/config/gpu_driver_bug_workaround_type.h
index 32a5ff1..56d95f7 100644
--- a/gpu/config/gpu_driver_bug_workaround_type.h
+++ b/gpu/config/gpu_driver_bug_workaround_type.h
@@ -24,6 +24,8 @@
          disable_arb_sync)                                   \
   GPU_OP(DISABLE_ASYNC_READPIXELS,                           \
          disable_async_readpixels)                           \
+  GPU_OP(DISABLE_BLEND_EQUATION_ADVANCED,                    \
+         disable_blend_equation_advanced)                    \
   GPU_OP(DISABLE_CHROMIUM_FRAMEBUFFER_MULTISAMPLE,           \
          disable_chromium_framebuffer_multisample)           \
   GPU_OP(DISABLE_D3D11,                                      \