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>

3 files changed, 3 insertions, 3 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;