Rename web/pdf_viewer.js to web/base_viewer.js

Please note that the only reason for this change is to try and improve reviewability of later patches, by keeping the diffs more manageable.

web/app.js

@@ -27,7 +27,7 @@ import {
 import { CursorTool, PDFCursorTools } from './pdf_cursor_tools';
 import { PDFRenderingQueue, RenderingStates } from './pdf_rendering_queue';
 import { PDFSidebar, SidebarView } from './pdf_sidebar';
-import { PDFViewer, PresentationModeState } from './pdf_viewer';
+import { PDFViewer, PresentationModeState } from './base_viewer';
 import { getGlobalEventBus } from './dom_events';
 import { OverlayManager } from './overlay_manager';
 import { PasswordPrompt } from './password_prompt';

web/pdf_viewer.component.js

@@ -16,7 +16,7 @@
 'use strict';
 
 var pdfjsLib = require('./pdfjs.js');
-var pdfjsWebPDFViewer = require('./pdf_viewer.js');
+var pdfjsWebPDFViewer = require('./base_viewer.js');
 var pdfjsWebPDFPageView = require('./pdf_page_view.js');
 var pdfjsWebPDFLinkService = require('./pdf_link_service.js');
 var pdfjsWebTextLayerBuilder = require('./text_layer_builder.js');