[Autofill] Use internal pseudo-id for autofill suggestions previews.

Bug: 779070
Change-Id: I951b2d8d612c3c9da5e237348267ff62c27b2a0f
Reviewed-on: https://chromium-review.googlesource.com/741003Reviewed-by: Keishi Hattori <keishi@chromium.org>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512484}

third_party/WebKit/LayoutTests/fast/forms/suggested-value-after-empty-suggested-value-expected.txt

@@ -86,9 +86,9 @@ Input after setting suggestedValue:
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | <br>
@@ -102,9 +102,9 @@ Input after setting suggestedValue:
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: block !important; text-overflow: clip;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | <br>
@@ -117,9 +117,9 @@ Input after setting suggestedValue:
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | <br>
@@ -132,9 +132,9 @@ Input after setting suggestedValue:
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: block !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | <br>

third_party/WebKit/LayoutTests/fast/forms/suggested-value-after-setvalue-expected.txt

@@ -9,9 +9,9 @@ After setting suggestedValue:
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | "input.value: initial value"

third_party/WebKit/LayoutTests/fast/forms/suggested-value-expected.txt

@@ -9,9 +9,9 @@ instead of "initial value".
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | <input>
@@ -70,9 +70,9 @@ instead of "initial value".
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 | <select>

third_party/WebKit/LayoutTests/platform/win7/fast/forms/suggested-value-expected.txt

@@ -9,9 +9,9 @@ instead of "initial value".
 |   <shadow:root>
 |     <div>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggested"
+|       pseudo="-internal-input-suggested"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |       "suggested value"
 |     <div>
 |       "suggested value"
@@ -70,9 +70,9 @@ instead of "initial value".
 |   this.value="initial value"
 |   <shadow:root>
 |       id="placeholder"
-|       pseudo="-webkit-input-suggestedx"
+|       pseudo="-internal-input-suggestedx"
 |       style="display: none !important;"
-|       shadow:pseudoId="-webkit-input-suggested"
+|       shadow:pseudoId="-internal-input-suggested"
 |     <div>
 | <select>
 |   id="select"

third_party/WebKit/Source/core/css/html.css

@@ -521,7 +521,7 @@ input[type="password" i] {
     -webkit-text-security: disc !important;
 }
 
-input[type="password" i]::-webkit-input-suggested {
+input[type="password" i]::-internal-input-suggested {
     -webkit-text-security: disc !important;
 }
 

third_party/WebKit/Source/core/html/forms/TextControlElement.cpp

@@ -998,9 +998,9 @@ void TextControlElement::SetSuggestedValue(const String& value) {
 
   // Change the pseudo-id to set the style for suggested values or reset the
   // placeholder style depending on if there is a suggested value.
-  placeholder->SetShadowPseudoId(AtomicString(suggested_value_.IsEmpty()
-                                                  ? "-webkit-input-placeholder"
-                                                  : "-webkit-input-suggested"));
+  placeholder->SetShadowPseudoId(
+      AtomicString(suggested_value_.IsEmpty() ? "-webkit-input-placeholder"
+                                              : "-internal-input-suggested"));
 }
 
 HTMLElement* TextControlElement::CreateInnerEditorElement() {