Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/web/progress_indicator_egtest.mm

Index: ios/chrome/browser/web/progress_indicator_egtest.mm
diff --git a/ios/chrome/browser/web/progress_indicator_egtest.mm b/ios/chrome/browser/web/progress_indicator_egtest.mm
index 36f6a9885525d6fb6952f385f52853e514787d16..9919acccee4dc0fec0f2050e2d046f431f57de62 100644
--- a/ios/chrome/browser/web/progress_indicator_egtest.mm
+++ b/ios/chrome/browser/web/progress_indicator_egtest.mm
@@ -7,6 +7,7 @@
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/strings/sys_string_conversions.h"
 #include "base/time/time.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/chrome/test/app/navigation_test_util.h"
@@ -21,6 +22,7 @@
 #include "ios/web/public/test/response_providers/html_response_provider.h"
 #include "url/gurl.h"
 
+using base::SysUTF8ToNSString;
 using chrome_test_util::WebViewContainingText;
 
 namespace {
@@ -149,8 +151,7 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
   chrome_test_util::LoadUrl(infinitePendingURL);
 
   // Wait until the page is half loaded.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageText)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey waitForWebViewContainingText:SysUTF8ToNSString(kPageText)];
 
   // Verify progress view visible and halfway progress.
   [[EarlGrey selectElementWithMatcher:ProgressViewWithProgress(0.5)]
@@ -182,12 +183,16 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
   // Load form first.
   [ChromeEarlGrey loadURL:formURL];
 
+  // TODO(crbug.com/707009): Replace this matcher with
+  // [ChromeEarlGrey waitForWebViewContainingText].
   [[EarlGrey selectElementWithMatcher:WebViewContainingText(kFormPageText)]
       assertWithMatcher:grey_notNil()];
 
   chrome_test_util::SubmitWebViewFormWithId(kFormID);
 
   // Wait until the page is half loaded.
+  // TODO(crbug.com/707009): Replace this matcher with
+  // [ChromeEarlGrey waitForWebViewContainingText].
   [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageText)]
       assertWithMatcher:grey_notNil()];
 
@@ -215,14 +220,13 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
 
   [ChromeEarlGrey loadURL:formURL];
 
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kFormPageText)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey
+      waitForWebViewContainingText:SysUTF8ToNSString(kFormPageText)];
 
   chrome_test_util::SubmitWebViewFormWithId(kFormID);
 
   // Verify the new page has been loaded.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageText)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey waitForWebViewContainingText:SysUTF8ToNSString(kPageText)];
 
   // Verify progress view is not visible.
   [[EarlGrey selectElementWithMatcher:ProgressView()]
@@ -245,8 +249,8 @@ class InfinitePendingResponseProvider : public HtmlResponseProvider {
   [ChromeEarlGrey loadURL:formURL];
 
   // Verify the form page has been loaded.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kFormPageText)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey
+      waitForWebViewContainingText:SysUTF8ToNSString(kFormPageText)];
 
   chrome_test_util::SubmitWebViewFormWithId(kFormID);