AP9-163: the setting of text scaling doesn't work.

This ensures that when we change Settings->Accessibility->Text scaling,
will work on all web pages.

build/bromite_patches_list.txt

@@ -169,3 +169,4 @@ Force-tablet-mode.patch
 Set-default-page-url.patch
 change-Android-userAgent-to-deskmode-userAgent.patch
 Force-desktop-mode.patch
+Force-accessibility-text-scaling.patch

build/patches/Force-accessibility-text-scaling.patch

@@ -0,0 +1,55 @@
+From: Yifeng <wuyifeng@nd.com.cn>
+Date: Fri, 5 Nov 2021 05:53:00 +0000
+Subject: Force accessibility text scaling
+
+This ensures that when we set text scaling, it will work on all web pages.
+
+---
+ third_party/blink/renderer/core/layout/text_autosizer.cc | 6 ++----
+ 1 file changed, 2 insertions(+), 4 deletions(-)
+
+diff --git a/third_party/blink/renderer/core/layout/text_autosizer.cc b/third_party/blink/renderer/core/layout/text_autosizer.cc
+--- a/third_party/blink/renderer/core/layout/text_autosizer.cc
++++ b/third_party/blink/renderer/core/layout/text_autosizer.cc
+@@ -668,14 +668,14 @@
+     // TODO(pdr): pageNeedsAutosizing should take into account whether
+     // text-size-adjust is used anywhere on the page because that also needs to
+     // trigger autosizing. See: crbug.com/646237.
+     page_info_.page_needs_autosizing_ =
+         !!page_info_.shared_info_.main_frame_width &&
+         (page_info_.accessibility_font_scale_factor_ *
+              page_info_.shared_info_.device_scale_adjustment *
+              (static_cast<float>(
+                   page_info_.shared_info_.main_frame_layout_width) /
+               page_info_.shared_info_.main_frame_width) >
+-         1.0f);
++         0.0f);
+   }
+
+   if (page_info_.page_needs_autosizing_) {
+@@ -1208,23 +1208,21 @@
+ void TextAutosizer::ApplyMultiplier(LayoutObject* layout_object,
+                                     float multiplier,
+                                     SubtreeLayoutScope* layouter,
+                                     RelayoutBehavior relayout_behavior) {
+   DCHECK(layout_object);
+   const ComputedStyle& current_style = layout_object->StyleRef();
+   if (!current_style.GetTextSizeAdjust().IsAuto()) {
+     // The accessibility font scale factor is applied by the autosizer so we
+     // need to apply that scale factor on top of the text-size-adjust
+     // multiplier. Only apply the accessibility factor if the autosizer has
+     // determined a multiplier should be applied so that text-size-adjust:none
+     // does not cause a multiplier to be applied when it wouldn't be otherwise.
+-    bool should_apply_accessibility_font_scale_factor = multiplier > 1;
+     multiplier = current_style.GetTextSizeAdjust().Multiplier();
+-    if (should_apply_accessibility_font_scale_factor)
+-      multiplier *= page_info_.accessibility_font_scale_factor_;
+   } else if (multiplier < 1) {
+     // Unlike text-size-adjust, the text autosizer should only inflate fonts.
+     multiplier = 1;
+   }
++  multiplier *= page_info_.accessibility_font_scale_factor_;
+
+   if (current_style.TextAutosizingMultiplier() == multiplier)
+     return;
+2.17.1