[unseasoned-pdf] Implement modal dialog methods

Fixed: 1221577
Change-Id: I0b32ec6868c75fa86d12a40597dd4d3ca85b8629
Bug: 1221577
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2973027
Auto-Submit: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: Hui Yingst <nigi@chromium.org>
Reviewed-by: Hui Yingst <nigi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#894012}

pdf/pdf_view_web_plugin.cc

@@ -141,6 +141,19 @@ class BlinkContainerWrapper final : public PdfViewWebPlugin::ContainerWrapper {
     GetFrame()->SetReferrerForRequest(request, referrer_url);
   }
 
+  void Alert(const blink::WebString& message) override {
+    GetFrame()->Alert(message);
+  }
+
+  bool Confirm(const blink::WebString& message) override {
+    return GetFrame()->Confirm(message);
+  }
+
+  blink::WebString Prompt(const blink::WebString& message,
+                          const blink::WebString& default_value) override {
+    return GetFrame()->Prompt(message, default_value);
+  }
+
   void TextSelectionChanged(const blink::WebString& selection_text,
                             uint32_t offset,
                             const gfx::Range& range) override {
@@ -449,15 +462,20 @@ void PdfViewWebPlugin::NotifyNumberOfFindResultsChanged(int total,
 void PdfViewWebPlugin::NotifySelectedFindResultChanged(int current_find_index) {
 }
 
-void PdfViewWebPlugin::Alert(const std::string& message) {}
+void PdfViewWebPlugin::Alert(const std::string& message) {
+  container_wrapper_->Alert(blink::WebString::FromUTF8(message));
+}
 
 bool PdfViewWebPlugin::Confirm(const std::string& message) {
-  return false;
+  return container_wrapper_->Confirm(blink::WebString::FromUTF8(message));
 }
 
 std::string PdfViewWebPlugin::Prompt(const std::string& question,
                                      const std::string& default_answer) {
-  return "";
+  return container_wrapper_
+      ->Prompt(blink::WebString::FromUTF8(question),
+               blink::WebString::FromUTF8(default_answer))
+      .Utf8();
 }
 
 void PdfViewWebPlugin::Print() {}

pdf/pdf_view_web_plugin.h

@@ -65,6 +65,16 @@ class PdfViewWebPlugin final : public PdfViewPluginBase,
     virtual void SetReferrerForRequest(blink::WebURLRequest& request,
                                        const blink::WebURL& referrer_url) = 0;
 
+    // Calls underlying WebLocalFrame::Alert().
+    virtual void Alert(const blink::WebString& message) = 0;
+
+    // Calls underlying WebLocalFrame::Confirm().
+    virtual bool Confirm(const blink::WebString& message) = 0;
+
+    // Calls underlying WebLocalFrame::Prompt().
+    virtual blink::WebString Prompt(const blink::WebString& message,
+                                    const blink::WebString& default_value) = 0;
+
     // Calls underlying WebLocalFrame::TextSelectionChanged().
     virtual void TextSelectionChanged(const blink::WebString& selection_text,
                                       uint32_t offset,

pdf/pdf_view_web_plugin_unittest.cc

@@ -99,6 +99,15 @@ class FakeContainerWrapper final : public PdfViewWebPlugin::ContainerWrapper {
               (blink::WebURLRequest&, const blink::WebURL&),
               (override));
 
+  MOCK_METHOD(void, Alert, (const blink::WebString&), (override));
+
+  MOCK_METHOD(bool, Confirm, (const blink::WebString&), (override));
+
+  MOCK_METHOD(blink::WebString,
+              Prompt,
+              (const blink::WebString&, const blink::WebString&),
+              (override));
+
   MOCK_METHOD(void,
               TextSelectionChanged,
               (const blink::WebString&, uint32_t, const gfx::Range&),