Remove some pointless assignments to "".

Or change them to clear().

Change-Id: Ia9e3e1f0d74b948cec3f8df85d205f830ac9216c
Reviewed-on: https://pdfium-review.googlesource.com/19172
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

6 files changed, 7 insertions, 7 deletions

diff --git a/core/fpdfapi/parser/fpdf_parser_decode.cpp b/core/fpdfapi/parser/fpdf_parser_decode.cpp
index 7ad6c0176f..8a31643632 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode.cpp
+++ b/core/fpdfapi/parser/fpdf_parser_decode.cpp
@@ -411,7 +411,7 @@ bool PDF_DataDecode(const uint8_t* src_buf,
     last_buf = new_buf;
     last_size = new_size;
   }
-  *ImageEncoding = "";
+  ImageEncoding->clear();
   *pImageParms = nullptr;
   *dest_buf = last_buf;
   *dest_size = last_size;
diff --git a/core/fpdfdoc/cpdf_interform.cpp b/core/fpdfdoc/cpdf_interform.cpp
index e42095c048..e71e16cddd 100644
--- a/core/fpdfdoc/cpdf_interform.cpp
+++ b/core/fpdfdoc/cpdf_interform.cpp
@@ -691,7 +691,7 @@ ByteString CPDF_InterForm::GenerateNewResourceName(
   int iCount = csStr.GetLength();
   int m = 0;
   if (iMinLen > 0) {
-    csTmp = "";
+    csTmp.clear();
     while (m < iMinLen && m < iCount)
       csTmp += csStr[m++];
     while (m < iMinLen) {
diff --git a/core/fxge/win32/fx_win32_gdipext.cpp b/core/fxge/win32/fx_win32_gdipext.cpp
index 70da194be4..1a7e132c64 100644
--- a/core/fxge/win32/fx_win32_gdipext.cpp
+++ b/core/fxge/win32/fx_win32_gdipext.cpp
@@ -682,7 +682,7 @@ CGdiplusExt::CGdiplusExt() {
   m_pGdiRemoveFontMemResourseEx = nullptr;
 }
 void CGdiplusExt::Load() {
-  ByteString strPlusPath = "";
+  ByteString strPlusPath;
   char buf[MAX_PATH];
   GetSystemDirectoryA(buf, MAX_PATH);
   strPlusPath += buf;
diff --git a/fpdfsdk/formfiller/cba_fontmap.cpp b/fpdfsdk/formfiller/cba_fontmap.cpp
index 625ce469c7..d675676616 100644
--- a/fpdfsdk/formfiller/cba_fontmap.cpp
+++ b/fpdfsdk/formfiller/cba_fontmap.cpp
@@ -38,7 +38,7 @@ CBA_FontMap::~CBA_FontMap() {}
 void CBA_FontMap::Reset() {
   Empty();
   m_pDefaultFont = nullptr;
-  m_sDefaultFontName = "";
+  m_sDefaultFontName.clear();
 }
 
 void CBA_FontMap::Initialize() {
diff --git a/fxjs/cjs_global.cpp b/fxjs/cjs_global.cpp
index 0fef8d5334..db63a4b8b9 100644
--- a/fxjs/cjs_global.cpp
+++ b/fxjs/cjs_global.cpp
@@ -555,7 +555,7 @@ CJS_Return JSGlobalAlternate::SetGlobalVariables(const ByteString& propname,
     if (pTemp->bDeleted || pTemp->nType != nType) {
       pTemp->dData = 0;
       pTemp->bData = 0;
-      pTemp->sData = "";
+      pTemp->sData.clear();
       pTemp->nType = nType;
     }
     pTemp->bDeleted = false;
diff --git a/samples/pdfium_test.cc b/samples/pdfium_test.cc
index 644aee7819..bc0ad86297 100644
--- a/samples/pdfium_test.cc
+++ b/samples/pdfium_test.cc
@@ -1285,7 +1285,7 @@ bool RenderPage(const std::string& name,
     const char* buffer =
         reinterpret_cast<const char*>(FPDFBitmap_GetBuffer(bitmap.get()));
 
-    std::string&& image_file_name = "";
+    std::string image_file_name;
     switch (options.output_format) {
 #ifdef _WIN32
       case OUTPUT_BMP:
@@ -1335,7 +1335,7 @@ bool RenderPage(const std::string& name,
 
     // Write the filename and the MD5 of the buffer to stdout if we wrote a
     // file.
-    if (options.md5 && image_file_name != "")
+    if (options.md5 && !image_file_name.empty())
       OutputMD5Hash(image_file_name.c_str(), buffer, stride * height);
   } else {
     fprintf(stderr, "Page was too large to be rendered.\n");