gpu: introduce DISABLE_TEXTURE_STORAGE workaround for mesa

gpu/command_buffer/tests/gl_texture_storage_unittest.cc

Index: gpu/command_buffer/tests/gl_texture_storage_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_texture_storage_unittest.cc b/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
index 3006888aa6be6eb6ea13e02bd0c21cf9d061cca5..257fd7eb6f75881fd3441abb2dc81482d6d81729 100644
--- a/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
+++ b/gpu/command_buffer/tests/gl_texture_storage_unittest.cc
@@ -5,8 +5,11 @@
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 
+#include "base/command_line.h"
+#include "base/strings/string_number_conversions.h"
 #include "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
+#include "gpu/config/gpu_switches.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -16,9 +19,16 @@ class TextureStorageTest : public testing::Test {
  protected:
   static const GLsizei kResolution = 64;
   void SetUp() override {
+    base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
+    command_line.AppendSwitchASCII(
+        switches::kGpuDriverBugWorkarounds,
+        base::IntToString(gpu::DISABLE_TEXTURE_STORAGE));
+
     GLManager::Options options;
     options.size = gfx::Size(kResolution, kResolution);
-    gl_.Initialize(options);
+
+    gl_.InitializeWithCommandLine(options, &command_line);
+    DCHECK(gl_.workarounds().disable_texture_storage);
     gl_.MakeCurrent();
 
     glGenTextures(1, &tex_);
@@ -60,6 +70,9 @@ TEST_F(TextureStorageTest, CorrectPixels) {
                   2, 2,
                   GL_RGBA, GL_UNSIGNED_BYTE,
                   source_pixels);
+
+  // Mesa dirvers crash without DISABLE_TEXTURE_STORAGE workaround.
+  // crbug.com/521904
   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 2, 2, 0, source_pixels));
 }