Move build/ to build_gyp/.

README.md

 # PDFium
 
 ## News
 
 As of 2016-02-04, the XFA branch is deprecated.  Instead, see the section on
 configuration below.
 
 ## Prerequisites
 
 Get the chromium depot tools via the instructions at
@@ skipping 20 matching lines @@
 
 We use the GYP library to generate the build files.
 
 At this point, you have two options. The first option is to use the [Ninja]
 (http://martine.github.io/ninja/) build system (also included with the
 depot\_tools checkout). This is the default as of mid-September, 2015.
 Previously, the second option (platform-specific build files) was the default.
 Most PDFium developers use Ninja, as does our [continuous build system]
 (http://build.chromium.org/p/client.pdfium/).
 
- * On Windows: `build\gyp_pdfium`
- * For all other platforms: `build/gyp_pdfium`
+ * On Windows: `build_gyp\gyp_pdfium`
+ * For all other platforms: `build_gyp/gyp_pdfium`
 
 The second option is to generate platform-specific build files, i.e. Makefiles
 on Linux, sln files on Windows, and xcodeproj files on Mac. To do so, set the
 GYP\_GENERATORS environment variable appropriately (e.g. "make", "msvs", or
 "xcode") before running the above command.
 
 ### Selecting build configuration
 
 PDFium may be built either with or without JavaScript support, and with
 or without XFA forms support.  Both of these features are enabled by
 default. Also note that the XFA feature requires JavaScript.
 
 To build without XFA, set `pdf_enable_xfa=0` before running `gyp_pdfium`.
 To build without JavaScript, set `pdf_enable_v8=0 pdf_enable_xfa=0` before
 running `gyp_pdfium`. For example
 ```
-GYP_DEFINES='pdf_enable_v8=0 pdf_enable_xfa=0' build/gyp_pdfium
+GYP_DEFINES='pdf_enable_v8=0 pdf_enable_xfa=0' build_gyp/gyp_pdfium
 ```
 gives the smallest possible build configuration.
 
 ### Using goma (Googlers only)
 
 If you would like to build using goma, pass `use_goma=1` to `gyp_pdfium`. If
 you installed goma in a non-standard location, you will also need to set
 `gomadir`. e.g.
 
 ```
-build/gyp_pdfium -D use_goma=1 -D gomadir=path/to/goma
+build_gyp/gyp_pdfium -D use_goma=1 -D gomadir=path/to/goma
 ```
 
 ## Building the code
 
 If you used Ninja, you can build the sample program by: `ninja -C out/Debug
 pdfium_test` You can build the entire product (which includes a few unit
 tests) by: `ninja -C out/Debug`.
 
 If you're not using Ninja, then building is platform-specific.
 
  * On Linux: `make pdfium_test`
- * On Mac: `open build/all.xcodeproj`
- * On Windows: open build\all.sln
+ * On Mac: `open build_gyp/all.xcodeproj`
+ * On Windows: open build_gyp\all.sln
 
 ## Running the sample program
 
 The pdfium\_test program supports reading, parsing, and rasterizing the pages of
 a .pdf file to .ppm or .png output image files (windows supports two other
 formats). For example: `out/Debug/pdfium_test --ppm path/to/myfile.pdf`. Note
 that this will write output images to `path/to/myfile.pdf.<n>.ppm`.
 
 ## Testing
 
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 as much as possible. The main exceptions is:
 
 1. Code has to conform to the existing style and not Chromium/Google style.
 
 ## Branches
 
 Prior to 2016-02-04, there existed an actively developed origin/xfa branch.
 The origin/xfa branch is now an evolutionary dead-end. Everything you need
 to build either with or without the XFA feature is on origin/master.