Split DumpPixelsAsync in pixel_dump.h into more granular functions.

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index 4a6ef125a80f95d3d4cafb18f9eadecb2d9b0fca..e5dc0f7789556e8f856e4ab21fd028f0f8ec5425 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -923,8 +923,13 @@ void BlinkTestRunner::CaptureDumpContinued() {
       interfaces->TestRunner()->ShouldGeneratePixelResults() &&
       !interfaces->TestRunner()->ShouldDumpAsAudio()) {
     CHECK(render_view()->GetWebView()->IsAcceleratedCompositingActive());
+
+    // Test finish should only be processed in the BlinkTestRunner associated
+    // with the current, non-swapped-out RenderView.
+    DCHECK(render_view()->GetWebView()->MainFrame()->IsWebLocalFrame());
+
     interfaces->TestRunner()->DumpPixelsAsync(
-        render_view()->GetWebView(),
+        render_view()->GetWebView()->MainFrame()->ToWebLocalFrame(),
         base::Bind(&BlinkTestRunner::OnPixelsDumpCompleted,
                    base::Unretained(this)));
     return;