[iOS] Set WebPageDefaultZoomFromDynamicType to disabled

This flag was mistakenly created enabled by default instead of disabled
by default.

Bug: 1127308
Change-Id: Ie20fbbf5ad63081f8b106ebe5066e98a8f3d9063
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404792
Commit-Queue: Robbie Gibson <rkgibson@google.com>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806230}

ios/chrome/browser/web/features.cc

@@ -10,7 +10,7 @@ const base::Feature kWebPageTextAccessibility{"WebPageTextAccessibility",
                                               base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kWebPageDefaultZoomFromDynamicType{
-    "WebPageDefaultZoomFromDynamicType", base::FEATURE_ENABLED_BY_DEFAULT};
+    "WebPageDefaultZoomFromDynamicType", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kMobileGoogleSRP{"MobileGoogleSRP",
                                      base::FEATURE_DISABLED_BY_DEFAULT};

ios/chrome/browser/web/font_size_tab_helper_unittest.mm

@@ -9,12 +9,14 @@
 #include "base/strings/stringprintf.h"
 #import "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_feature_list.h"
 #include "base/test/task_environment.h"
 #include "components/sync_preferences/pref_service_mock_factory.h"
 #include "components/sync_preferences/pref_service_syncable.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/chrome/browser/prefs/browser_prefs.h"
+#include "ios/chrome/browser/web/features.h"
 #include "ios/web/public/test/fakes/fake_web_frame.h"
 #import "ios/web/public/test/fakes/fake_web_frames_manager.h"
 #import "ios/web/public/test/fakes/test_web_state.h"
@@ -36,6 +38,9 @@ class FontSizeTabHelperTest : public PlatformTest {
  public:
   FontSizeTabHelperTest()
       : application_(OCMPartialMock([UIApplication sharedApplication])) {
+    scoped_feature_list_.InitAndEnableFeature(
+        {web::kWebPageDefaultZoomFromDynamicType});
+
     OCMStub([application_ preferredContentSizeCategory])
         .andDo(^(NSInvocation* invocation) {
           [invocation setReturnValue:&preferred_content_size_category_];
@@ -91,6 +96,7 @@ class FontSizeTabHelperTest : public PlatformTest {
   }
 
  protected:
+  base::test::ScopedFeatureList scoped_feature_list_;
   base::test::TaskEnvironment task_environment_;
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
   web::TestWebState web_state_;