Make //pdf:pdf_ppapi target a static_library.

Like the //pdf:pdf build target change in https://crrev.com/c/2309135,
it also needs to be a static library to avoid ODR violations in
component builds.

Bug: 1107602
Change-Id: I50e941d1bb0eedd23ddb42f0a75af705a52079c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2308941
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790254}

pdf/BUILD.gn

@@ -35,13 +35,11 @@ if (enable_pdf) {
     ]
   }
 
-  component("pdf_ppapi") {
+  static_library("pdf_ppapi") {
     sources = [ "pdf_ppapi.cc" ]
 
     configs += [ ":pdf_common_config" ]
 
-    defines = [ "IS_PDF_PPAPI_IMPL" ]
-
     public = [ "pdf_ppapi.h" ]
 
     deps = [

pdf/pdf_ppapi.h

@@ -11,11 +11,9 @@
 
 namespace chrome_pdf {
 
-COMPONENT_EXPORT(PDF_PPAPI)
 int PPP_InitializeModule(PP_Module module_id,
                          PPB_GetInterface get_browser_interface);
-COMPONENT_EXPORT(PDF_PPAPI) void PPP_ShutdownModule();
-COMPONENT_EXPORT(PDF_PPAPI)
+void PPP_ShutdownModule();
 const void* PPP_GetInterface(const char* interface_name);
 
 }  // namespace chrome_pdf