Create ChromeEarlGrey waitForWebViewContainingText.

ios/web/shell/test/plugin_placeholder_egtest.mm

Index: ios/web/shell/test/plugin_placeholder_egtest.mm
diff --git a/ios/web/shell/test/plugin_placeholder_egtest.mm b/ios/web/shell/test/plugin_placeholder_egtest.mm
index 843a9d45911d0a28b0965a511d2bbe659ae23998..7e39fa5754072e6b38711df88922dbc9d52b20bd 100644
--- a/ios/web/shell/test/plugin_placeholder_egtest.mm
+++ b/ios/web/shell/test/plugin_placeholder_egtest.mm
@@ -20,7 +20,6 @@
 #error "This file requires ARC support."
 #endif
 
-using web::WebViewContainingText;
 using web::WebViewCssSelector;
 
 namespace {
@@ -57,10 +56,8 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that placeholder image is not displayed.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kFallbackText)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
+  [ShellEarlGrey waitForWebViewContainingText:kFallbackText];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img")]
       assertWithMatcher:grey_nil()];
 }
@@ -78,8 +75,7 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that plugin object is replaced with placeholder image.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img[src*='data']")]
       assertWithMatcher:grey_notNil()];
 }
@@ -101,8 +97,7 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that plugin object is replaced with placeholder image.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img[src*='data']")]
       assertWithMatcher:grey_notNil()];
 }
@@ -124,10 +119,8 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that placeholder image is not displayed.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kFallbackText)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
+  [ShellEarlGrey waitForWebViewContainingText:kFallbackText];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img")]
       assertWithMatcher:grey_nil()];
 }
@@ -146,8 +139,7 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that plugin object is replaced with placeholder image.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img[src*='data']")]
       assertWithMatcher:grey_notNil()];
 }
@@ -165,8 +157,7 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that placeholder image is not displayed.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img")]
       assertWithMatcher:grey_nil()];
 }
@@ -203,8 +194,7 @@ void LoadPage(const std::string& page_content) {
   LoadPage(page);
 
   // Verify that placeholder image is not displayed.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kPageDescription)]
-      assertWithMatcher:grey_notNil()];
+  [ShellEarlGrey waitForWebViewContainingText:kPageDescription];
   [[EarlGrey selectElementWithMatcher:WebViewCssSelector("img")]
       assertWithMatcher:grey_nil()];
 }