Revert "gpu: Disable AImageReader for ARM GPUs on Android P and below."

This reverts commit 56d27fb4.

Reason for revert: This was a temporarily landed as a safer merge
candidate for M81. The long term fix for the bug has already landed.

Original change's description:
> gpu: Disable AImageReader for ARM GPUs on Android P and below.
> 
> This change adds a temporary workaround to effectively revert the
> following changes. While the long term fix for this bug has landed, it
> might be too risky to merge to M81. So this change reverts enabling of
> AImageReader on these GPUs, to restore the behaviour prior to M80.
> 
> Reverted changes:
> https://chromium-review.googlesource.com/c/chromium/src/+/2015553
> https://chromium-review.googlesource.com/c/chromium/src/+/1873393
> 
> TBR=nyquist@chromium.org
> R=​dalecurtis@chromium.org
> 
> Bug: 1051705
> Change-Id: I2f7f0828c8ba4a7279c2f6bb95de449402d88f92
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2087987
> Commit-Queue: Khushal <khushalsagar@chromium.org>
> Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#747355}

TBR=dalecurtis@chromium.org,nyquist@chromium.org,khushalsagar@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1051705
Change-Id: I97c4e3198a3581fc3c437894c0be57681d4d80fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2107807Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Khushal <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751247}

base/android/android_image_reader_compat.cc

@@ -22,8 +22,6 @@
 namespace base {
 namespace android {
 
-bool AndroidImageReader::disable_support_ = false;
-
 AndroidImageReader& AndroidImageReader::GetInstance() {
   // C++11 static local variable initialization is
   // thread-safe.
@@ -31,12 +29,8 @@ AndroidImageReader& AndroidImageReader::GetInstance() {
   return *instance;
 }
 
-void AndroidImageReader::DisableSupport() {
-  disable_support_ = true;
-}
-
 bool AndroidImageReader::IsSupported() {
-  return !disable_support_ && is_supported_;
+  return is_supported_;
 }
 
 AndroidImageReader::AndroidImageReader() {

base/android/android_image_reader_compat.h

@@ -22,9 +22,6 @@ class BASE_EXPORT AndroidImageReader {
   // Thread safe GetInstance.
   static AndroidImageReader& GetInstance();
 
-  // Disable image reader support.
-  static void DisableSupport();
-
   // Check if the image reader usage is supported. This function returns TRUE
   // if android version is >=OREO, image reader support is not disabled and all
   // the required functions are loaded.
@@ -67,7 +64,6 @@ class BASE_EXPORT AndroidImageReader {
   AndroidImageReader();
   bool LoadFunctions();
 
-  static bool disable_support_;
   bool is_supported_;
   pAImage_delete AImage_delete_;
   pAImage_deleteAsync AImage_deleteAsync_;

gpu/config/gpu_driver_bug_list.json

@@ -3568,22 +3568,6 @@
         "dont_delete_source_texture_for_egl_image"
       ]
     },
-    {
-      "id":335,
-      "cr_bugs": [1051705],
-      "description": "Disable AImageReader on ARM GPUs",
-      "os": {
-        "type": "android",
-        "version": {
-          "op": "<",
-          "value": "10"
-        }
-      },
-      "gl_vendor": "ARM.*",
-      "features": [
-        "disable_aimagereader"
-      ]
-    },
     {
       "id": 336,
       "cr_bugs": [625785],

gpu/config/gpu_workaround_list.txt

@@ -13,7 +13,6 @@ decode_encode_srgb_for_generatemipmap
 depth_stencil_renderbuffer_resize_emulation
 disable_2d_canvas_auto_flush
 disable_accelerated_vpx_decode
-disable_aimagereader
 disable_async_readpixels
 disable_av_sample_buffer_display_layer
 disable_blend_equation_advanced

gpu/ipc/service/gpu_init.cc

@@ -524,12 +524,6 @@ bool GpuInit::InitializeAndStartSandbox(base::CommandLine* command_line,
   ui::OzonePlatform::GetInstance()->AfterSandboxEntry();
 #endif
 
-#if defined(OS_ANDROID)
-  // Disable AImageReader if the workaround is enabled.
-  if (gpu_feature_info_.IsWorkaroundEnabled(DISABLE_AIMAGEREADER)) {
-    base::android::AndroidImageReader::DisableSupport();
-  }
-#endif
 #if defined(USE_OZONE)
   gpu_feature_info_.supported_buffer_formats_for_allocation_and_texturing =
       std::move(supported_buffer_formats_for_texturing);
@@ -556,11 +550,6 @@ void GpuInit::InitializeInProcess(base::CommandLine* command_line,
 
   default_offscreen_surface_ = gl::init::CreateOffscreenGLSurface(gfx::Size());
 
-  // Disable AImageReader if the workaround is enabled.
-  if (gpu_feature_info_.IsWorkaroundEnabled(DISABLE_AIMAGEREADER)) {
-    base::android::AndroidImageReader::DisableSupport();
-  }
-
   UMA_HISTOGRAM_ENUMERATION("GPU.GLImplementation", gl::GetGLImplementation());
 }
 #else