Initialize some struct members in a test to fix MSAN failure.

Bug: 845143, 843511
Change-Id: I87afc7235692c52502048dcf7ae6036ae8551e51
Reviewed-on: https://chromium-review.googlesource.com/1067491Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Katie Dektar <katie@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561533}

components/pdf/renderer/OWNERS

-per-file pdf_accessibility_tree.*=dmazzoni@chromium.org
+per-file pdf_accessibility_tree*=dmazzoni@chromium.org
 per-file pepper_pdf_host.*=bbudge@chromium.org
 per-file pepper_pdf_host.*=raymes@chromium.org
 

components/pdf/renderer/pdf_accessibility_tree_browsertest.cc

@@ -92,6 +92,10 @@ class PdfAccessibilityTreeTest : public content::RenderViewTest {
     viewport_info_.zoom = 1.0;
     viewport_info_.scroll = {0, 0};
     viewport_info_.offset = {0, 0};
+    viewport_info_.selection_start_page_index = 0;
+    viewport_info_.selection_start_char_index = 0;
+    viewport_info_.selection_end_page_index = 0;
+    viewport_info_.selection_end_char_index = 0;
     doc_info_.page_count = 1;
     page_info_.page_index = 0;
     page_info_.text_run_count = 0;
@@ -107,13 +111,7 @@ class PdfAccessibilityTreeTest : public content::RenderViewTest {
   std::vector<PP_PrivateAccessibilityCharInfo> chars_;
 };
 
-#if defined(MEMORY_SANITIZER)
-// https://crbug.com/845143
-#define MAYBE_TestEmptyPDFPage DISABLED_TestEmptyPDFPage
-#else
-#define MAYBE_TestEmptyPDFPage TestEmptyPDFPage
-#endif
-TEST_F(PdfAccessibilityTreeTest, MAYBE_TestEmptyPDFPage) {
+TEST_F(PdfAccessibilityTreeTest, TestEmptyPDFPage) {
   content::RenderFrame* render_frame = view_->GetMainRenderFrame();
   render_frame->SetAccessibilityModeForTest(ui::AXMode::kWebContents);
   ASSERT_TRUE(render_frame->GetRenderAccessibility());