Set the background color and the toolbar height for PdfViewWebPlugin.

Bug: 1099020
Change-Id: I1cf7d7f1403bc9639568b451b409660edc9e264d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2560911
Commit-Queue: Hui Yingst <nigi@chromium.org>
Reviewed-by: K. Moon <kmoon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835076}

pdf/pdf_view_web_plugin.cc

@@ -103,8 +103,19 @@ bool PdfViewWebPlugin::Initialize(blink::WebPluginContainer* container) {
 
   std::string stream_url;
   for (size_t i = 0; i < initial_params_.attribute_names.size(); ++i) {
-    if (initial_params_.attribute_names[i] == "stream-url")
+    if (initial_params_.attribute_names[i] == "stream-url") {
       stream_url = initial_params_.attribute_values[i].Utf8();
+    } else if (initial_params_.attribute_names[i] == "background-color") {
+      if (!base::HexStringToUInt(initial_params_.attribute_values[i].Utf8(),
+                                 &background_color_)) {
+        return false;
+      }
+    } else if (initial_params_.attribute_names[i] == "top-toolbar-height") {
+      if (!base::StringToInt(initial_params_.attribute_values[i].Utf8(),
+                             &top_toolbar_height_in_viewport_coords_)) {
+        return false;
+      }
+    }
   }
 
   // Contents of `initial_params_` no longer needed.
@@ -268,7 +279,7 @@ bool PdfViewWebPlugin::IsPrintPreview() {
 }
 
 uint32_t PdfViewWebPlugin::GetBackgroundColor() {
-  return 0;
+  return background_color_;
 }
 
 void PdfViewWebPlugin::IsSelectingChanged(bool is_selecting) {}

pdf/pdf_view_web_plugin.h

@@ -128,6 +128,12 @@ class PdfViewWebPlugin final : public PdfViewPluginBase,
   blink::WebPluginParams initial_params_;
   blink::WebPluginContainer* container_ = nullptr;
 
+  // The background color of the PDF viewer.
+  uint32_t background_color_ = 0;
+  // The blank space above the first page of the document reserved for the
+  // toolbar.
+  int top_toolbar_height_in_viewport_coords_ = 0;
+
   base::WeakPtrFactory<PdfViewWebPlugin> weak_factory_{this};
 };